Exclusive: Cameron Diaz and John Mayer Dating!  —  Cameron Diaz has dipped back into the musician well to find herself a new guy — John Mayer!  The 34-year-old Shrek actress, whose almost 4-year relationship with Justin Timberlake ended in January, and rocker Mayer were spotted out in New York last night …

BIEL'S GOING BARE  —  SHE'S been shy about bearing her bod every since her racy Gear magazine spread hit stands in 2000, but Jessica Biel plans to shed her threads in the upcoming movie "Powder Blue," which co-stars Forest Whitaker.  Us Weekly reports that she'll play a...

Gwen Stefani Can't Wait to Get Pregnant Again  —  Calling herself "a geeky Orange County girl, a chola girl, a rasta girl and an English girl - all mixed together," Gwen Stefani has no mixed feelings about one thing: producing a sibling for her 1-year-old son Kingston.

Amy's brain scan after rehab  —  and VIRGINIA WHEELER  —  TROUBLED AMY WINEHOUSE sensationally walked out of rehab yesterday — then took a helicopter to London for a brain scan.  —  The heroin and cocaine-addicted singer quit after less than 48 hours — despite her worried parents' pleas to stay.

Heidi Klum Brings the Sexy Back After Her Third Child  —  Klum in a new Jordache ad  —  Less than a year after having her third child, Heidi Klum has returned to high-profile modeling with sexy new Jordache ads in which she wears little more than jeans and a stare.  —  So how has she managed a supermodel body after baby?

Backstreet Boy Howie Dorough to Marry  —  Backstreet Boy Howie Dorough and his longtime girlfriend, Leigh Boniello, are engaged, the couple tell PEOPLE exclusively.  —  They plan to marry later this year.  —  "She wasn't expecting it, and I was quite nervous - more nervous about proposing …

Cruise's Rep: Suri Not the New Face of Baby Gap  —  Suri Cruise is not ready for her close-up.  —  A rep for Tom Cruise is denying reports that his youngest daughter is going to be the new face of Baby Gap.  —  The rumor is "totally untrue," according to the actor's publicist.

Bored like Beckham: Posh fails to crack a smile as David finally scores for Galaxy  —  Weeks after their much-hyped arrival in the US, with his debut delayed due to a pesky ankle injury, David Beckham finally scored for team LA Galaxy - but wife Victoria remained strangely unmoved.

NOT REALLY REAL  —  THEY call MTV's "The Hills" a "reality" show, but we've had our doubts for some time.  Fueling our skepticism, on Tuesday night, the star, Lauren Conrad, showed up at Da Silvano for dinner with three friends and a camera crew.  One irked diner told us, "It was clear that this show is not a reality show.

Sex, romps and paparazzi: Britney Spears breaks down as custody battle gets dirty  —  A tearful Britney broke down after visiting her lawyer to discuss her increasingly dirty custody battle.  —  Ex-husband Kevin Federline has served legal papers on some of the stars closest friends associates …

Brad Pitt Dismisses Adoption Reports  —  Actor Brad Pitt has denied reports he and girlfriend Angelina Jolie are planning to adopt a fourth child from Africa.  —  Earlier this week, a British newspaper claimed the Mr. & Mrs. Smith co-stars are hoping to adopt a baby girl from Ethiopia …

SEEING DOUBLE  —  "ENTOURAGE" star Adrian Grenier bears an eerie resemblance to "American Idol" castoff Sanjaya - at least to Nick Tosches writing in Maxim.  Tosches, the best-selling biographer of Dean Martin and Sonny Liston, recalls watching Sanjaya get booted off "Idol," writing …

House Costars Call Off Engagement  —  House costars Jennifer Morrison and Jesse Spencer have called off their engagement, PEOPLE has learned exclusively.  —  "After much consideration, we have decided not to get married," the couple said in a joint statement.

MADONNA SHOCKS AEROPLANE PASSENGERS WITH MID-AIR VITAMIN JAB  —  Madonna is reported to have started injecting herself with vitamins to boost her energy levels.  —  The singer, who turns 49 on Thursday, is said to have surprised passengers on a recent flight from New York to London by injecting herself with a vitamin shot in her arm.

Bachelor Andy and Tessa Break Off Engagement  —  Last season's The Bachelor stars, Lt. Andy Baldwin and his chosen lady, social worker Tessa Horst, confirm to PEOPLE that they have broken their engagement but not their bond with each other.  —  "We are very much in love and committed to our relationship …

RED OVER PINK  —  AN avant-garde Manhattan painter is suing Pink for copyright infringement, saying the pop cutie used one of his works in a 2006 music video.  In his case filed in Manhattan District Court, Vladimir Kush charges Pink and her record company, Zomba...