Ali Lohan on plastic surgery rumours: 'I was cracking up'

Ali Lohan has insisted that she has not undergone plastic surgery, calling the rumours "stupid".

The 17-year-old, who signed a multi-year modelling contract with NEXT Model Management earlier this year, was thought to have gone under the knife after she appeared in photos looking visibly thinner with changed facial features.

While both her mother Dina and sister Lindsay Lohan have vehemently denied that Ali has ever had any cosmetic procedure, the model has now spoken out for the first time in a new interview.

"I was cracking up. Because, like, when would I do that? I'm 17 years old. That's not legal! I would need my mother's signature, and do you think my mum would ever sign off on that? No!" Ali told Page Six Magazine.

"It's stupid. I don't listen to it. It's absolutely not true."

In October 2010, Ali was one of hundreds of celebrities to have their personal details hacked by a US State Department clerk.