The ex-girlfriend of The Hills star Brody Jenner revealed the news during a night out in Hollywood on Wednesday (28Jul10), when she was snapped with a bandage on her chin.

Nicole admitted she had recently had preventative surgery but declined to go into further detail.

But she refused to allow the health scare to affect her social life, telling TMZ.com, "I'm not going to let anything stop me from going to my friend's birthday party."

Nicole hit the headlines last year (09) after becoming embroiled in a lawsuit with Girls Gone Wild mogul Joe Francis. The model sued the adult filmmaker for allegedly attacking her in a nightclub, although Francis was never charged and the lawsuit was subsequently dismissed.