Tiger Woods is doing good — and evidently having a very, very good time doing it! With girlfriend Lindsey Vonn at his side, the golfer, 37, hosted his annual Tiger’s Poker Night at Moorea Beach Club Beachside Casino at Mandalay Bay in Las Vegas on Friday, May 17. Presented by the World Poker Tour, the $10,000 buy-in poker tournament benefits Woods’ titular foundation.

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Before the bash began, a hotel employee spotted Woods entering the casino with a coterie of women, including Vonn, 28 — and already appeared to be enjoying himself. “He looked like a hot mess!” the employee cracks. “His hair was all messed up.”

Once inside the casino, Woods quickly lost to an amateur player, but happily stayed throughout the tournament to hob-nob with other other celeb guests — including Mark Cuban, Kid Rock, Mehki Phifer, L.A. Clippers player Chris Paul and many poker pros, with the band Lifehouse performing towards the end of the evening.

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The evening was part of the weekend-long Tiger Jam in Vegas, benefiting the Tiger Woods Foundation. Wearing a sexy blue dress during the poker tournament, Vonn was thrilled to be part of the weekend, and took along her sister, Karin Kildow for the festivities. “The girls at Tiger Jam!” she tweeted.

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It’s been an eventful May for the couple — who made a splash at the Met Gala  two weeks ago, and showed off their beach bods hanging out on Woods’ yacht in Florida earlier this week.

To donate to the Tiger Woods Foundation — which provides scholarships and other educational opportunities for underserved youth — click here.

Brace yourselves, Twihards: After four very eventful years together, Robert Pattinson and Kristen Stewart are taking a much-needed break, a source close to Pattinson, 27, tells Us Weekly. Additional Pattinson insiders add that the British actor and Stewart, 23, have been “having problems” and “fighting a lot,” with things coming to a head on Pattinson’s 27th birthday May 13.

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Still, the first source adds that the much-scrutinized romance could go either way, and that a reconciliation is certainly possible. Just one week before the bitter birthday argument that led to the current split, in fact, the twosome were happily affectionate at NYC’s Cabin, where Pattinson met Stewart following her solo appearance at the Met Gala.

Former child star Stewart met the British actor when they were cast opposite one another in 2008′s Twilight, the first of five blockbuster films based on Stephenie Meyer‘s bestselling vampire book series. As the movie phenomenon exploded over the years, the twosome very, very slowly went public with their romance.

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The relationship was put to the ultimate test last July, when Stewart was photographed making out in a public park with Rupert Sanders, her married Snow White and the Huntsman director, in shocking exclusive photos revealed by Us Weekly. Quickly after Us broke the story, Stewart made her most public display of affection ever in a public apology.

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“I’m deeply sorry for the hurt and embarrassment I’ve caused to those close to me and everyone this has affected,” she said July 25. “This momentary indiscretion has jeopardized the most important thing in my life, the person I love and respect the most, Rob. I love him, I love him, I’m so sorry.”

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(Sanders and wife Liberty Ross, meanwhile, are already done: The British model, who shares two young kids with the director, filed divorce papers in January.)

The pair reconciled by fall 2012, and jointly promoted Breaking Dawn: Part 2 together. They even appeared to survive several months thousands of miles apart as Pattinson filmed The Rover in Australia in early 2013.

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Reps could not be reached for comment.

Well, there’s now probably one name out of the running for Kim Kardashian and Kanye West‘s baby-to-be: Briseis. That’s the moniker chosen by her ex Reggie Bush and his fiancee Lilit Avagyan for their little girl, the NFL star confirmed to  Us Weekly at the Work Out With Reggie Bush And Mission Athletecare event in NYC Thursday, April 16.

As first revealed by Us, little Briseis was born May 6, and weighed in at 8 pounds, 9 ounces. “She’s brand new. She’s doing great,” Bush told Us. “She’s amazing. She;s so beautiful. I love her to death. It’s just been an amazing experience so far so I’m very excited – just being a father.”

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Fatherhood itself is still sinking in for the Bush, who split with Kardashian back in 2010. “I look at [Briseis] and I can’t believe she’s mine. There’s still that element of I can’t believe this came from me.”

Bush has been spending some necessary time at training camp with the Lions, but baby and his wife-to-be are the priority. “When I’m with her, I want to spend time with her so I’m doing my best to make sure I’m home as much as possible.”

PHOTOS: Kim’s pregnant bikini body

As for his Armenian-born dancer love Avagyan, 25? “My love has always been strong for her, but I think it just grounds us more. Having a child now just grounds us more . . . She has the wisdom of a 35 year old. She’s very mature for her age.” The pair hope to wed “next summer,” he revealed.

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Bush is no longer in touch with Kardashian — whose own baby-to-be with Kanye West is due in July. “I always wish her well. Always.”

No more real-life hangovers for Zach Galifianakis. The actor, 43, has “stopped drinking,” he told Conan O’Brien on a Wednesday, May 15 appearance on Conan. Looking noticeably thinner, the bearded comic star revealed he “was getting into too much trouble with the drinking.” It was one incident in particular during a drunken night out on the Lower East Side of Manhattan that inspired the Hangover III standout to lay off the sauce.

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Taking a long walk home, “I’d gotten into the whiskey that night, and was listening to my headphones,” he explained. Crossing Ludlow Street, “this guy in a Jaguar cut me off,” he said. Intoxicated and annoyed, the star retaliated. “As he cut my off, I hit the car as hard as i could with my hand.”

Seconds later, Galifianakis got a tap on the shoulder. “I turn around, it’s two huge 6-foot-6 guys [from the Jaguar],” he recalled. “They both, at the same time, spit in my face!”

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“I don’t know if you’ve ever been spit in the face non-sexually,” he joked to O’Brien, “But all I remember is being so stunned.” As his assailants walked away, “I remember reaching into a trash can and grabbing a beer bottle and saying out loud, ‘Nobody spits in Galifianakis’ face!’”

He threw the bottle at the car — but, thankfully, “It missed!”

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Galifianakis wed longtime love, philanthropist Quinn Lundberg, in Vancouver last August.

Taylor Swift will play an unusual role at the Billboard Awards in Las Vegas this Sunday, May 19: Third wheel and/or referee to close pal Selena Gomez and on-and-off boyfriend Justin Bieber! A source tells Us Weekly that the singer-songwriter, 23, will sit in the front row at the MGM Grand Garden Arena right next to BFF Gomez, 20, who in turn will sit alongside Bieber, 19.

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Gomez and Bieber have reunited more than once since their breakup back in January, and it’s “clearly no accident” that they’ll be seatmates at Sunday’s high-profile awards show, the source says. “Their camps must have requested this seating arrangement,” adds the insider. “No way would it have happened without their go-ahead.”

As for currently single Swift? “Of course Selena’s BFF will be sitting next to her!” the source adds.

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Bieber was spotted rehearsing for the big show on Friday. “There was no sign of Selena, but he was in great spirits,” an onlooker says of the performance, in which he’ll croon “Take You.”

After kissing backstage in Norway, the volatile couple were photographed cuddling in an Instagram photo posted by Bieber himself in late April. But during a May 10 radio interview, Gomez told the DJ that she’s “available.”

PHOTOS: Taylor’s romantic history

The Billboard Awards air live from Las Vegas on Sunday, May 18, at 8 p.m. on ABC.

Well, hello there, Amy Adams! The Oscar-nominated actress, 38, has played a broad swathe of characters in her film career — and in her latest movie, David O. Russell’s American Hustle, Adams is working her sexiest looks yet. Shooting the film, set in the 1970s, in lower Manhattan on Friday, May 17, the star flirted with a potential wardrobe malfunction in a silky brown mini-dress with a shockingly deep v-neck which grazed her navel and showed off a generous portion of cleavage.

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Rocking Farrah Fawcett-style waves, the redhead completed the on-set look with a gold necklace, earrings and belt, a camel-colored coat and brown pumps.

PHOTOS: LOL! Amy’s lesser-known pre-fame role

Her costar for the scene. Bradley Cooper, was memorable for a different reason entirely: The actor, 38, donned a 70s-style blue suit and the tight, hilarious perm he debuted back in March for the period piece, which also stars Jennifer Lawrence, Christian Bale, Jeremy Renner and Robert DeNiro.

PHOTOS: Bradley Cooper’s love life

The historical thriller dramatizes the real-life FBI sting operation, known as ABSCAM, which led to the conviction of a U.S. Congressman. Adams plays Sydney, mistress to a con artist played by Bale.

Liam Hemsworth is living it up in one of the most glamorous, romantic spots on the planet . . . without fiancee Miley Cyrus. The Australian actor, 23, hit the Cannes Film Festival to attend a Friday, May 17 promotional event for Hunger Games sequel Catching Fire; reuniting with costar Jennifer Lawrence, the pair posed for photos with their new costar Sam Clafin, cast last year in the coveted role of Finnick.

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As Cyrus, 20, stays behind recording her album in Los Angeles, Hemsworth took advantage of the film festival nightlife. The blue-eyed hunk first arrived at the Belvedere party’s VIP Room around 1:20 a.m. on Saturday with a small group of male executives. Sipping beer (after declining an offer of champagne) and smoking a few Marlboro Lights, Hemsworth bopped along to the hip-hop tunes — and politely spoke to two pretty blonde, female fans who approached the table.

PHOTOS: Liam Hemsworth and Miley Cyrus’ love story

Next up, Hemsworth moved on to the Nikki Beach at Les Marches with a bodyguard for more low-key drinks and friendly chats with pretty fans. (He left past 3 a.m. alone.)

Although it’s tricky to keep up with Hemsworth and Cyrus’ relationship status, the Hannah Montana star recently began wearing her engagement ring again — flashing the rock in a recent Twitter pic and donning it to the Maxim 100 party in NYC earlier this week.

PHOTOS: Miley’s hair evolution

Tell Us: Will this couple make it to the altar?

When it comes to her parenting style, Sarah Michelle Gellar likes to keep it simple. Us Weekly caught up with the Buffy the Vampire Slayer actress at the CBS Upfront event for her new comedy series, The Crazy Ones, in New York City on Wednesday, May 15, where she shared her best parenting advice.

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Gellar, 36, is mom to daughter Charlotte, 3, and son Rocky, 8 months, with husband Freddie Prinze, Jr. Managing to juggle young children and her career, the actress told Us her parenting tip isn’t “too original,” but it works.

“Just trust your instincts,” she said. “There’s a reason why we have them.”

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In her big return to TV, the Ringer actress will be teaming up with Robin Williams for The Crazy Ones. The two stars will be playing father and daughter who work together at an ad agency. 

Williams, 61, who is a father of three from two previous marriages, joked with Us that his best parenting is to “just say no!”

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“What? To more children?” Gellar asked.

“Yes!” Williams, who tied the knot for the third time in October 2011, joked. “To more children. We have enough!”

This Real Housewife is now somebody’s real wife! Adriana De Moura wed longtime boyfriend Frederiq Marq in Coral Gables, Florida on Friday, May 18, Us Weekly can confirm. The Real Housewives of Miami star looked stunning in a dramatic gown with a poufy skirt, bedazzled embellishments and fringe. Frenchman Marq complemented the bride, wearing a white and ivory tux.

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Escorting the art dealer bride into the ceremony, which was taped for season three of the Bravo hit: Fellow housewives Marysol Patton, Lisa Hochstein and Alexia Echevarria. (Rumors suggest that De Moura and Marq had previously wed legally, with Friday’s bash marking their chance to celebrate with loved ones.)

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“Big day today!” Hochstein tweeted teasingly. According to a source, the reception had a Great Gatsby theme, and was held at the Biltmore Hotel.

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It’s the second union for the Brazlian-born beauty, who has one son from her previous marriage.

Khloe Kardashian and Kylie Jenner have got spirit! On the last day of their family vacation to Mykonos, Greece, the stepsisters got a little silly and decided to try out their cheerleading skills in the chilly water on Apr. 29.

“Kylie told Khloe, ‘YOLO!’ as in ‘You only live once,’” an onlooker explained to Us Weekly of the girls’ impromptu cheerleading routine.

PHOTOS: Kardashian family vacation in Greece

Kardashian, 28, wearing a black tank top and long black shorts, gave her 15-year-older a lift on her back. Jenner, wearing a bikini top and jean shorts, then stood up tall and raised her arms in the air. She was quickly caught on camera in her perfect cheerleading pose, but didn’t exactly stick the dismount. Instead, Jenner fell off Khloe’s back in the water with a big laugh.

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“I had the most magical time in Greece!” Khloe tweeted that same day. “All that was missing was [brother] Rob and my hubby [Lamar Odom]!! I missed them like crazy! Back in Cali heading to my boys.”

PHOTOS: Khloe Kardashian’s wedding photos

But once she got home, she started planning a trip back. “Just finished telling Lamar about our trip to Greece! I still can’t get over how stunning it is there,” she tweeted later that night. “I can’t wait to go back with my hubby.”