Hayden Christensen & Rachel Bilson Call Off Engagement  —  Rachel Bilson and Hayden Christensen have officially ended their engagement.  —  Reports surfaced a couple months ago that the duo were on a break, but now the split is permanent.  “Yes, the engagement is off,” Bilson's rep tells PEOPLE …

Portia to Ellen: I Want to Be a DeGeneres!  —  TMZ has learned ... Portia de Rossi will become Portia DeGeneres.  —  Portia has filed a petition to legally change her name to Portia Lee James DeGeneres.  She filed the papers in L.A. County Superior Court last Friday.

Levi Johnston to Run for Mayor of Wasilla  —  Vote for Levi Johnston?  —  The former Playgirl cover model, 20, is running for mayor of Wasilla, Alaska — and documenting it in his reality show, Loving Levi: The Road to the Mayor's Office, the executive producer, Canaan Rubin, tells UsMagazine.com in a statement.

Fantasia: I Am ‘Not Responsible’ For Divorce  —  Fantasia Barrino says she is “not responsible” for breaking up a marriage ... despite allegations from a North Carolina woman named Paula Cook who claims Fantasia made sex tapes with her husband.  —  Fantasia's manager, Brian Dickens …

One Tree Hill Actress' Marriage Over After a Month  —  Jana Kramer's marriage didn't make it over the first hill.  —  The One Tree Hill star and Johnathon Schaech, who tied the knot in Michigan on July 4, are already going their separate ways.  —  Talk about nipping something in the bud!

Witherspoon in tune with Peggy Lee  —  Actress circles Fox biopic, which Ephron will write  —  Reese Witherspoon and Fox 2000 are mounting an untitled biopic of singer Peggy Lee starring Witherspoon, with Nora Ephron writing and attached to direct.  —  Witherspoon — the driving force behind …

Kate Gosselin Is Going to the Emmys?!  —  The Emmys are right around the corner.  —  And we're happy to report that things seem to be coming along quite nicely.  —  Make that quite hilariously.  We just got some major scoopage on plans for the big show, happening on August 29.

Weezer Reveal ‘Hurley’ Album Cover — Exclusive  —  After putting a flying dog on the cover of ‘Raditude,’ Weezer are one-upping themselves for their upcoming eighth LP, ‘Hurley.’ This time 'round, they're forsaking an airborne animal for a celebrity: actor Jorge Garcia …

“I'm too pretty to be in jail,” Snooki said.  “I'm a good person.  I'm not a criminal, and I will never go back there.”  —  “You can't even contain me,” she added with a laugh.  “When I was in there, I was like, 'Can I come out?  I can't breathe!'  Not a fun place.  I will never go back.”

Kelsey Grammer ‘in love’ with young blonde  —  Kelsey Grammer is “deeply in love” with a young blonde just weeks after his divorce was filed.  —  The “Frasier” star, who's now starring in Broadway's “La Cage Aux Folles,” was spotted holding hands in town this weekend with the woman, who sources tell us is British and is called Kate.

THE AGONY OF ZAC EFRON  —  WOULD YOU BELIEVE THE CHARLIE ST. CLOUD STAR HAS BIGGER PROBLEMS THAN POISON OAK ON HIS NETHER REGIONS?  TURNS OUT, BEING THE NICEST ACTOR IN HOLLYWOOD IS TORTURE.  —  Zac Efron refuses to shake my outstretched hand.  “Oh, dude, I can't,” he says.  “I've got a bad case of poison oak.”

Audrina Patridge — Bikini Bikini in Bora Bora  —  Sporting matching hairless chests, former “Hills” star Audrina Patridge and her sometimes boyfriend Justin Bobby Corey Bohan turned up the heat while on vacation in Bora Bora this weekend.  —  Smooth.  —  See also  — Audrina's Alleged Stalker — Check Your Head

Oksana: Mel's Lawyers Went Nuclear Over Chernobyl  —  Oksana Grigorieva is pissed that Mel Gibson's lawyers insinuated she pocketed money during a trip she took to Moscow to help victims of the Chernobyl nuclear disaster.  —  As TMZ first reported ... Oksana was grilled during her deposition last week about her finances.

Rachel Zoe: “I Die”  —  The much-talked-about stylist has developed a cult following for her look, her reality show, and her dramatic turn of phrase.  But what would happen if she really did die for fashion?  America's top designers go in for the kill.  Click here to see Rachel Zoe's finest red-carpet moments.

Elvis' granddaughter eyeing role in fourth ‘Mad Max’ film (exclusive)  —  Riley Keough, the granddaughter of Elvis Presley, is in talks to nab a role in “Fury Road,” the fourth installment of the “Mad Max” movies from writer-director George Miller.  —  Miller also is producing with Doug Mitchell.

Van Halen recording new album with David Lee Roth  —  Twenty-six years after they last recorded together, the 80s hard rockers are back in the studio with their original singer  —  Van Halen are working on their first album in more than a decade, and they're runnin' with David Lee Roth.

JetBlue flight attendant who went nuts was in bed with boyfriend when found by cops  —  The plane had just landed, but he was ready to take off.  —  A JetBlue flight attendant blew his top, grabbed a beer and bolted out an emergency slide at Kennedy Airport on Monday - then headed home to have sex with his boyfriend.

With Lindsay in Rehab, Assistant in Dina & Ali Hell  —  There is actually a job more insane than being Lindsay Lohan's assistant — tending to the needs of her mom and sister!  —  Sources close to Elinore, Lindsay's long-suffering assistant, tell TMZ she is “miserable,” “super-stressed” …

‘He told us how to have sex’: DiCaprio  —  Kate Winslet and Leonardo DiCaprio played a husband and wife in Revolutionary Road, directed by Winslet's then-husband Sam Mendes.  —  Leonardo DiCaprio has revealed Kate Winslet “freaked out” when they had to film love scenes for Revolutionary Road.

Ke$ha Debuts New Aussie Boyfriend at Lollapalooza  —  Ke$ha's love is apparently her new boyfriend's drug of choice!  —  The “Your Love Is My Drug” singer headed to Chicago this weekend with her new man, Alex Carapetis, in tow for Lollapalooza.  The new twosome hit up the Music Lounge together and couldn't hide their affection.