Mariah Pregnancy Rumors, Oprah's Big Gain

Either Mariah Carey is pregnant or she's determined to do whatever it takes to stay in the spotlight. The diva was spotted looking "ebullient" on her way out of an OB/GYN's office in LA, where she was greeted by a cheering entourage and seen clutching "what looked like a sonogram." [P6, Mirror]
Kate Moss skipped champagne and wore a loose dress to a Vogue event in China, which means she must be pregnant, too. [The Sun]
In an upcoming issue of O, Oprah says she's "fallen off the wagon" and now weighs 200 lbs. But she blames it on her "out-of-balance thyroid," which gave her "a fear of working out." [AP]
Russian billionaire Roman Abramovich watching soccer at Nevada Smith's in the East Village with girlfriend Dasha Zhukova? We can hardly believe it. [P6]
Steve Schwarzman insisting on remaining centerstage at yesterday's Vanity Fair photo shoot? That sounds likely. [P6]

What did Pamela Anderson's do at Art Basel last weekend? She drank absinthe, made out with Stephen Dorff, spent a "wild night" in her hotel with someone who wasn't Stephen Dorff, and eventually passed out. [P6]
Someone bid $12,000 at a charity auction to go on a date with Anne Hathaway. [E!]
Madonna won her breach-of-privacy lawsuit against the The Mail yesterday for publishing stolen photos of her wedding to Guy Ritchie. [P6]
Chris Martin looked a little "mopey" and walked out of his house alone, which must mean he and Gwyneth Paltrow are splitting up. [NYDN]
Angelina Jolie is buying Brad Pitt a Ducati motorcycle for his birthday, you'll be happy to hear. [In Touch]
What does Jennifer Aniston see in John Mayer? In a new interview, she says he's "a rare one," whose brain is "extraordinary" and "beautiful." [The Sun]
Joe Biden brought 30 secret service agents to his daughter-in-law's birthday party at the Elephant on the Lower East Side. [P6, NYDN]
Clay Aiken is reportedly dating a Broadway dancer named Reed Kelly. [Star]
Amy Winehouse's husband Blake Fielder-Civil allegedly brought drugs to Amy in rehab before going back to jail last week. [The Sun]
Lily Allen says she's planning to finally sober up. [NYDN]
Team Britney is reportedly drug testing her backup dancers to keep away "negative influences." Also: PETA is objecting to the animals in her latest music video. [LAT, E!]
Another D-lister brought down by the financial crisis: American Idol winner Fantasia Barrino's North Carolina house is going into foreclosure. [Us]