Nicole, skinny? No!

Friends and family are concerned for startlingly thin Nicole Richie, 23, wondering if she's the latest member of Hollywood's superthin set (whose members include Mary-Kate Olsen, 19, and Richie pal Lindsay Lohan, 20). "She looks like a skeleton," said one insider who saw Richie at the opening of Hollywood club LAX . "I was horrified at how skinny she is." "She's been thin for a while," says a source, "but now her chest is practically concave and her legs are thin pins!" At the center of the controversy over Richie's weight is the star's fiance, Adam Goldstein, a.k.a. DJ AM, who two years ago carried a whopping 324 pounds on his 5'9" frame before undergoing gastric bypass surgery reports Star Magazine. Goldstein is now down to a slim 169 pounds, but friends are worried that the pair, who became engaged last February after two years of dating, may be involved in an extreme game of dieting. "The two of them hardly eat, Nicole especially," says one regular on the L.A. club scene. "I don't think Adam is aware of how thin Nicole's gotten because he sees her all the time - he just says how sexy she looks. Nicole's now working out all the time and they have both totally cut out junk food." [The Bosh]