Jen Aniston, John Mayer Make Public Debut  —  Jen Aniston and John Mayer went to their first public event together Thursday night.  —  They joined Courteney Cox and David Arquette — who celebrated their nine-year anniversary that night — at a humanitarian event at L.A. steakhouse STK.

Supermodel Adriana Lima Engaged to Basketball Star  —  Adriana Lima's GQ cover (left) and Marko Jaric  —  Photo by: Inez Van Lamsweerde & Vinoodh Matadin / GQ; Rocky Widner / NBAE via Getty  —  Brazilian supermodel Adriana Lima received an engagement ring Thursday night - her birthday …

UNDIES AD FUELS ‘CHORUS’ FEUD  —  WHAT started as a battle of the biceps has turned into the battle of the bulges between stars of Broadway's “A Chorus Line.”  —  Last month, Mario Lopez (photo, facing page) and co-star Nick Adams clashed when Lopez refused to wear his character Zach's trademark costume of a long-sleeve tan sweater.

'Grey's' insider calls Heigl's Emmy comments ‘an ungrateful slap’  —  One day after Grey's Anatomy's Katherine Heigl announced that she would drop out of this year's Emmy race, because “I do not feel I was given the material this season to warrant a nomination,” a key show insider contacted EW.com …

Bachelor Matt Grant Moves Out of Fiancée's Pad  —  Matt Grant has moved out of fiancée Shayne Lamas's condominium, but the English Bachelor insists that all is well with the two.  —  The couple have cohabitated at Lamas's Century City, Calif., place since the Bachelor season ended …

Exclusive: Pamela Anderson and Tommy Lee Are Together Again  —  We visited Mötley Crüe in their Hollywood rehearsal studio yesterday as they prepped for their summer CrueFest tour.  Yes, they rocked, and we'll have a full report in the next issue of Rolling Stone, but because you're our pals …

Kate Moss loses her hair extensions in Berlin  —  Supermodel Kate Moss has started shedding her hair in very public fashion.  —  The 34-year-old was left a little red-faced on the red carpet in Germany after her blonde hair extensions fell out, landing in heap on the ground.

VANISHING ICE  —  HIP-hop mogul, fashion designer and jeweler Russell Simmons is out $15,000 after a suitcase full of his bling was swiped from a Bleecker Street apartment building.  The case - which contained three diamond rings, a pendant, three sets of earrings and two bracelets …

Mariah might scrap plans for second wedding  —  Plus: Sherri Shepherd gears up for Emmy's; weekend box office  —  Mariah Carey's Big Apple wedding might be off, according to sources close to Carey.  The pop diva and her husband, Nick Cannon, hoped to have a lavish celebration …

Boy or girl?  Pete Wentz wants to know  —  Pete Wentz doesn't want any surprises when his new wife, Ashlee Simpson-Wentz, gives birth in October.  “I'd like to know the sex of the baby,” he told In Touch at Op's “Open Road” campaign celebration on June 3.  “It would be a bummer if you bought a boy a bunch of pink stuff!”

Josh Gracin Expecting Baby No. 4  —  Clay Aiken isn't the only American Idol alum who's a dad-to-be.  —  Season four finalist Josh Gracin and his wife of seven years, Ann Marie, are expecting their fourth child together, the singer's rep tells OK!.  —  “We're all excited about the new addition to the Gracin clan,” Josh says.

Aziz Ansari hired for ‘Office’ spinoff  —  Details beginning to leak about new series  —  Details are finally starting to emerge on NBC's highly anticipated “The Office” spinoff — including the show's first cast hire, Aziz Ansari of MTV's sketch comedy “Human Giant.”

Jon Voight joins ‘24’  —  Will play the villain in the seventh season  —  In his first series role in 40 years, Jon Voight has signed on for the upcoming seventh season of “24.”  —  On the Emmy-winning Fox drama, Voight will play Jack Bauer's (Kiefer Sutherland) uber-nemesis who is pulling …