Who's the daddy: Pregnant Jamie Lynn Spears dumped by boyfriend who demands proof of paternity  —  Pregnant Jamie Lynn Spears has been dumped by boyfriend Casey Aldridge because he doubts he is the father, it has been claimed.  —  Aldridge is insisting that TV star Jamie Lynn, 16 …

Rep: Rocker Avril Lavigne Not Pregnant  —  Jennifer Aniston isn't the only celeb debunking pregnancy rumors.  —  A rep for Avril Lavigne tells Usmagazine.com the rocker is not expecting.  —  Citing an “insider,” Canadian radio host Zack Taylor wrote, “Avril is a month-and-a-half pregnant …

New Video: Britney Leaves the Country!  —  “The Insider” has the latest on the pop princess.  —  Check out the latest footage of BRITNEY SPEARS and her new paparazzi pal ADNAN GHALIB!  Despite rumors that the pop singer flew to New York, “The Insider” has learned that she drove down to Rosarito Beach, Mexico, Wednesday with Adnan.

Katie Holmes: Nicole's Pregnancy is ‘Wonderful’  —  Katie Holmes only had well wishes for Nicole Kidman Wednesday night at the Los Angeles premiere of her new film Mad Money.  —  “I'm so happy for her,” Holmes, 29, says of Kidman's pregnancy news.  “It's wonderful.”

Brit's Ultimate Fake-Out  —  Britney Spears hoaxed us all out — sending out the word she was winging her way to NYC, but HOLA ... she's in Mexico.  —  Video has just surfaced showing Brit driving around Mexico with Adnan, her new BFF/paparazzo.  This followed an elaborate fake-out involving Brit's people …

Oprah leaves Stedman out of her will  —  Plus: Jennifer Aniston's pals play matchmaker; where's Kevin Spacey?  —  Oprah Winfrey and Stedman Graham are pictured together in September 2002.  According to the National Enquirer, O isn't leaving a dime of her $2 billion fortune to her significant other of 21 years.

Side Dish  —  Golden girl Tyra Banks says that despite fame and fortune, she's a bird in a gilded cage.  “I'd go to work [on 'The Tyra Banks Show'], and women would be crying in my arms,” she tells the latest issue of Essence, on stands Saturday.  “But then I'd go home and put my key in my door and ... nothing.

Coroner: Donda Had a Heart Attack  —  TMZ has just received the final coroner's report on the death of Donda West.  The L.A. County Coroner has concluded that Kanye's mom died of “coronary artery disease and multiple post-operative factors due to or as a consequence of liposuction and mammoplasty.”

ADRIAN GRENIER PICKUP LINES: A PLAY IN ONE ACT  —  [Scene: A crowded loft on Manhattan's Lower East Side.  It is approximately 2:00 a.m.; the party is now winding down, though the bar is still open and people are still drunkenly—badly—dancing.  In walks Entourage star Adrian Grenier …

Tim Chapman of ‘Dog the Bounty Hunter’ Caught With Pants Down!  —  Timothy Chapman, sidekick of Duane Chapman - ‘Dog the Bounty Hunter’, appeared in court Wednesday for an arraignment after being charged with 'terroristic threatening'.  —  Police say a security guard was responding to reports …

Kathy Griffin — Undercover Without Cover  —  Kathy Griffin scared the crap out of people during a recent appearance on radio, and it had nothing to do with what she said.  She showed up sans makeup on Adam Carolla's morning radio show, lookin' interesting — not necessarily bad, just not at all like Kathy Griffin!

A Key To Britney  —  Here's that OK!  Magazine cover (of her and her boys) that Britney was not happy about.  But take a look closer... ...at that pink-beaded bracelet with a key (that has the number “6” on it) attached.  Guess where that key's from?  The Spa at the Four Seasons Hotel!

Joel's Big Bro: Nicole Richie Due ‘In The Next Week’  —  The countdown-to-baby has begun for Nicole Richie and Joel Madden.  —  Their first child is due “sometime in the next week,” Madden's older brother Josh told reporters at the FUZE/Resolution Slenderize bash in Hollywood Wednesday night.

Lindsay & Adrien: It's On!  —  Things between Lindsay Lohan and Adrien Grenier are heating up!  —  Lohan was first spotted at the Entourage star's New York City apartment last month.  —  “They're talking,” says a source close to the pair.  And by talking we're sure they mean “f**king.”

Halle Berry: ‘I Want to Stay Pregnant Forever’  —  Pregnancy certainly suits actress Halle Berry, whose first child is due in March.  —  “My skin is aglow from all the hormones,” the Oscar winner and star of the upcoming Class Act, 41, tells InStyle in its February issue.  “I want to stay pregnant forever.”

Biel extols ‘Virtue’ for Endgame  —  Jessica Biel has been cast as the lead in the romantic comedy “Easy Virtue,” based on the Noel Coward play, for London-based Ealing Studios.  —  Endgame Entertainment is financing the indie project.  —  Biel plays an American divorcee, Larita Huntington …

Toni Collette Has a Girl  —  She's played a mom on the big screen, but now Toni Collette is ready to embrace the role in real life.  The Little Miss Sunshine star gave birth to daughter Sage Florence on Wednesday in her hometown of Sydney, Australia, her rep tells PEOPLE.