BODY CONFIRMED AS MODEL'S: French police on Friday confirmed that a body pulled out of the Seine River was Katoucha Niane, the former Yves Saint Laurent muse. Niane, 47, disappeared after friends dropped her off at her houseboat after a night on the town. Investigators found her handbag. Police said an autopsy was conducted late Thursday and that Niane died by drowning and "there were no signs of violence." Niane was a favorite with Saint Laurent and Christian Lacroix in the Eighties and launched a short-lived fashion line in the Nineties. Services have yet to be set.