Rachel Weisz bundled up in the Village ... Roberto Cavalli walking on Madison Avenue with Serafina co-owner Fabio Granato ... Billy Joel and daughter Alexa walking uptown ... Rihanna filming a music video in Washington Heights and later heading into into a recording studio in Chelsea ... Miley Cyrus shooting scenes for Sex and the City 2 with Kim Cattrall in front of the Ziegfeld ... Paris Hilton posing for photographers after an appearance on The Wendy Williams Show ... Jon Gosselin and Hailey Glassman taking a carriage ride through Central Park ... Uma Thurman shopping at in SoHo ... and Sharon Osbourne and Cyndi Lauper shooting scenes for Celebrity Apprentice.
• The police were called to Mischa Barton's home yesterday and she was escorted out of the house so she could be treated for some sort of "medical issue." Her condition hasn't been disclosed yet, but we're going to go ahead and assume it wasn't a case of seasonal allergies. [Sun]
• Bethenny Frankel may be giving up her spot on the Real Housewives next season so she can star in a Bravo show of her own. Neither Frankel and Bravo were willing to confirm the news, though, so we're going to keep our fingers crossed and hope this is just a crazy rumor that has no basis in reality, okay? [P6]
• Kim Kardashian almost got stranded in Africa when she couldn't locate her passport. The operative word there is "almost": Sadly, boyfriend Reggie Bush found it a few minutes later, so she was able to return to the U.S. [People]