Oprah and Terence Koh Pried Lady Gaga Out of Her Dressing Room

And she's out!Photo: Patrick McMullan

Lady Gaga locked herself in her dressing room at Monday's Costume Institute Gala, but luckily Oprah and Terence Koh were able to convince her to come out and perform. Following the gala, Blake Lively ditched her Marchesa gown in favor of partying at the Boom Boom Room in a sequined mini and converse sneakers. Following the Yankees win against the White Sox, A-Rod joined his latest lady, Cameron Diaz, at Macao Trading Company to have dinner with Drew Barrymore and Gwyneth Paltrow. Charlize Theron and Keanu Reeves "got frisky" in front of photographers after dinner at Bouchon in Beverly Hills, sharing a long hug and several kisses. And speaking of getting frisky, Miley Cyrus breaks free of Hannah Montana in her new Can't Be Tamed video, in which she sports a $25,000 corset.

Conan O'Brien turned down interviews with Oprah, Larry King, and, not surprisingly, Letterman. Oprah chatted about how Gayle King likes to discount shop by buying Oscar de la Renta gowns at outlets. Julia Louis-Dreyfus's name was misspelled on her Hollywood Walk of Fame star. Paramount nixed a Zoolander sequel, so Ben Stiller tweeted, " Ron Burgundy and Derek Zoolander looking to appear in sequels. Both men destitute, without means or intellect to fund their own comebacks." And after mingling with Justin Bieber at the White House Correspondents' Dinner and tweeting that she had "Bieber fever," Kim Kardashian is getting death threats from the tweenie-bopper's fans, telling her to "back off."

Following the James Beard Awards at Lincoln Center, foodies and chefs headed over to David Chang's Má Pêche, where "people were doing keg stands and playing flip cup. It was basically a frat party." Joël Robuchon snacked on a roasted goat head on the sidewalk café at Da Silvano. At a lunch to launch Lauren Bush's new charity Feed Bears, Tinsley Mortimer was kicking herself for not betting more than $50 on winning Kentucky Derby horse Super Saver. Charlie Sheen's giving his ex-wife full custody of their kids. Kate Gosselin blogged that she's returning to Dancing With the Stars for the two May finales. Heidi Montag wants to enlarge her breasts again and film the surgery for a reality show she and Spencer Pratt are pitching to E! and Oxygen. We see it more as a scientific experiment in skin's elasticity. And Ke$ha was paid $50,000 to sing at what she thought was a girl's "beyond ostentatious" Sweet 16 party at Cipriani 42nd Street, but turns out it was her bat mitzvah.