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.

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 …

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.”

Levi Johnston — Lost a Fiancee, Gained a Reality Show  —  Levi Johnston is no longer engaged to Bristol Palin — but he's got a sweet new reality show deal to help him get over it.  —  Sources close to Johnston tell TMZ he signed a new reality deal this weekend, one that doesn't include …

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 …

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 …

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.

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.

Vampires Dominate 2010 Teen Choice Awards  —  Bloodsuckers struck another vein at the Teen Choice Awards with ‘The Twilight Saga’ ruling Sunday's ceremony with 12 wins, including choice fantasy movie and villain, while ‘The Vampire Diaries’ sucked up seven surfboard-shaped trophies at the taped ceremony …

FIRST LOOK: Justin Bieber's Book Cover Revealed  —  His debut album was all about My World.  Now, Justin Bieber wants to share more of his Story.  —  The pop star's first book, Justin Bieber: First Step 2 Forever: My Story, will hit bookstore shelves in October but PEOPLE.com has a first look …

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.

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” …

Rod Stewart to Be a Dad - Again  —  Congrats are in order for Rod Stewart: The rock legend and father of six - who said last fall that he was hoping for one more child - and his wife, Penny Lancaster, are expecting a baby.  —  “We were thrilled and delighted to be able to tell Alastair …

“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.”

Charlie Sheen — I Gave Cops False Identification  —  Charlie Sheen has another thing in common with your average college frat boy — dude kept a fake ID in his wallet ... one that he claims was made for him “on the set” of one of his projects, this according to a police report just obtained by TMZ.

JENNIFER ANISTON ON MOTHERHOOD: ANYTHING IS POSSIBLE  —  ET's Samantha Harris enjoyed some girl-talk with Jennifer Aniston, who opened up about motherhood and if she's ever considered going down the path of her character in ‘The Switch’ by looking into artificial insemination.

24's Annie Wersching Welcomes a Baby Boy  —  Annie Wersching's latest mission: Motherhood.  —  The 24 actress, 33, gave birth to her first child with husband Stephen Full Sunday at 4:46 PM in Los Angeles.  —  Baby Freddie (middle name: Wersching) Full, who weighs 7 lbs., 15 oz. …

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

Lady Gaga's Wild, Nearly Naked Crowd Surf At Lollapalooza  —  Lady Gaga returned to Lollapalooza this past weekend for the first time since 2007, and it's safe to say the crowd was just a bit bigger this time around.  Gaga went from playing a humble singer-songwriter set on a side stage …

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.

Birthday Boy Maddox Jolie-Pitt Satisfies a Need for Speed  —  From left: Maddox, Zahara and Pax Jolie-Pitt  —  He still has a way to go before he can get a driver's license, but Maddox Jolie-Pitt, who turned 9 on Aug. 5, hit the race track during a belated birthday celebration with his family on Saturday.

VIDEO: Lindsay Lohan on Playing a Porn Star  —  Before she spent 13 full days behind bars, Lindsay Lohan shot an inside look at her upcoming film, Inferno: A Linda Lovelace Story, in which she plays the late porn star.  —  In this exclusive, behind-the-scenes video, shot in a Burbank hotel in May …