Oscar De La Hoya — In Rehab  —  Boxing legend Oscar De La Hoya has entered rehab ... TMZ has learned.  —  We're told De La Hoya is seeking treatment for a substance abuse problem and checked into a California-area facility within the last few weeks.  —  Story developing ...  See also

Prince William & Kate Return Home from ‘Memorable’ Honeymoon  —  Prince William and bride Catherine are back in the U.K. after their 10-day honeymoon to an Indian Ocean paradise.  —  The couple are said to have had a “memorable” vacation in the Seychelles, the palace confirms to PEOPLE.

Report: Britney Spears To Perform At Billboard Music Awards  —  Britney's ready to bust it out this Sunday at the Billboard Music Awards in Las Vegas with a rumored TWO performances scheduled!  As Us Weekly report claims Brit will duet with Rihanna to open the show, performing “S&M.”

Exclusive: PETA Blasts Selena Gomez's Pink Painted Horses  —  Not everyone is a fan of Selena Gomez's latest video “Love You Like a Love Song.”  After the pop star was spotted on a Malibu beach with pink painted horses, animal right advocates including PETA were up in arms.

Jason Trawick — Sayonara, Britney ...  Jason Trawick has cut ties with Britney Spears ... but only professionally, TMZ has learned.  —  Sources close to the couple tell TMZ ... they are still doing great together, but Jason has decided to step aside as her agent.

Dr. Drew Visits Jeff Conaway, Says Actor Is Suffering From Pneumonia: ‘Not An OD’  —  LOS ANGELES, Calif. — Dr. Drew Pinsky has come to the defense of actor Jeff Conaway amidst reports claiming the former “Grease” star is near death following an overdose.  —  “Just visited Jeff Conaway,” Pinsky Tweeted Friday evening.

Justin Bieber — Can I Get a Lift?  —  Justin Bieber was left stranded on the side of the road in downtown Los Angeles today when the battery died on the crazy ride he was driving around in.  —  We're told Bieber was chilling with Rob Dyrdek at his Fantasy Factory, when he decided to take one of the cars out for a spin.

Kim Kardashian, Demi Lovato and Celebs Respond to “Rapture”  —  Dancing 'til the world ends?!  —  Celebs are tweeting up a storm about the theory of Saturday night's impending apocalypse.  —  While some Christians controversially predict May 21 to be the Rapture or Doomsday, most stars don't seem too concerned.

Supernatural Exclusive: Misha Collins Won't Be a Series Regular for Season 7  —  Brace yourself, Supernatural fans (as if Friday night's finale didn't already rob you of most every breath): Though his alter ego now is a bigger force than ever to be reckoned with, Misha Collins will not be returning …