Rihanna Had to Perform With Britney  —  You know how you were young and just about to go someplace really awesome, only to have your parents make you take your little brother or sister with you?  That has to be what it feels like to find out you're performing with Britney Spears.

Pics!!!  Lindsay Lohan Upskirt Shot & Nipple-Slip - All At The Same Sexy Photoshoot!  —  Lindsay Lohan did a photoshoot for Plum Miami Magazine yesterday.  The art direction for this editorial seems to have been - Put Lindsay in very sheer, flowy dresses on top of a building with a wind machine.

'I'm learning to celebrate what I was born with': Why life is shaping up nicely for Christina Hendricks  —  Adored by men (and envied by women) for her hourglass figure, Mad Men's Christina Hendricks is loving every minute of her success.  She talks to Lina Das about relishing her curves …

David Schwimmer and Wife Welcome Baby Girl  —  It's a girl for David Schwimmer!  —  The actor-director's wife, photographer Zoe Buckman, delivered their daughter Cleo Buckman Schwimmer on Sunday, May 8 in New York, his rep tells PEOPLE.  —  Schwimmer, 44, wed the London-born Buckman, 25, last June after dating since 2007.

Ahnold: I'll be broke  —  By SELIM ALGAR in LA and TODD VENEZIA in NY  —  It's not a rumor: If Maria Shriver terminates her marriage with Arnold Schwarzenegger, it could be one of the costliest celebrity splits ever.  —  Horny Arnie and his jilted journalist-wife, who split after learning the …

‘Two and a Half Men’ Star Ashton Kutcher Has Only a One-Year Contract … On Wednesday, CBS Corp. trotted out Ashton Kutcher as the new face of its hit sitcom “Two and a Half Men,” giving him time on stage during its presentation of its coming TV schedule to advertisers.

Showtime cancels ‘United States of Tara’  —  Toni Collette series to end after season three  —  Showtime is saying goodbye to “United States of Tara.”  —  Series, in which Toni Collette suffers from multiple personalities, will be finished when it end its third-season run in June.

Bar Refaeli Really Likes Bikinis  —  Because Leonardo DiCaprio isn't going to make himself jealous (Or won't he...), Bar Refaeli continued to wear bikinis in France over the weekend.  More importantly, I lead with a shot of her butt instead of her breasts for once because I'm growing as a person.

Ex-KISS Guitarist — Blood, Cuts, and 4 Dead Dogs  —  Former KISS guitarist Vincent Cusano — aka Vinnie Vincent — allegedly smacked his wife in the face and dragged her through a pile of broken glass on the night he was arrested ... and when cops arrived to the house, they found 4 dead dogs at the scene …

Actress Jane Seymour Claims Arnold Schwarzenegger Has Two Other Love Children  —  Actress Jane Seymour said she was not at all surprised when news of Arnold Schwarzenegger's love child became public and went on to say that she was aware of more children that the former California governor had outside of his 25 year marriage.

Feud Alert!  Zach Galifianakis Rips “Rude” January Jones  —  We can eliminate Zach Galifianakis from the list of January Jones' potential baby daddies—because he won't even pretend sleep with her.  —  The Hangover II funnyman is being brutally honest about a run-in he once had with the Mad Men beauty.

Julianne Hough Bikini Pictures  —  Every time I see pictures of this Julianne Hough chick in a bikini, I just get more and more impressed with her killer body.  I'm so jealous of that Seacrest douche, it's not even funny anymore.  Here she is hanging out by the pool giving us some great looks at her awesome bikini hotness.

Zach Galifianakis Shoots Up Heroin with Bill Maher  —  Zach Galifianakis is sure upping the ante when it comes to his on-air drug use.  Forget marijuana, Galifianakis is clamoring to join the big leaguers who partake in the high-life.  —  In October 2010, Galifianakis set the Internet …

De La Hoya — Cocaine Use Triggered Marital Infidelity  —  Oscar De La Hoya began drinking and using cocaine, which then caused him to have infidelity problems in his marriage ... sources connected with the former boxing champ tell TMZ.  —  We broke the story ... Oscar voluntarily checked himself …

Shiloh, Zahara, Pax, Maddox Snuck Into Mom Angelina's Premiere  —  Shiloh Jolie-Pitt and her siblings aren't quite ready for the red carpet yet — but they still got to cheer on their world-famous mom at Sunday's Hollywood premiere of Kung Fu Panda 2!  —  Although Angelina Jolie …

‘Jersey Shore’ is Going to Be About Ronnie and Sammi Fighting Again  —  If you actually thought the new season of Jersey Shore in Italy was finally going to have a different storyline that's not Ronnie and Sammi fighting every goddamn second, surprise!  They're back together.

Report: Anna Kournikova to Join ‘Biggest Loser’  —  It looks like ‘The Biggest Loser’ might have found another new trainer.  According to reports, tennis star Anna Kournikova will join the NBC fitness show next season.  —  Kournikova will join new trainers Cara Castronuova and Brett Hoebel …