Demi Moore is known for loving to go under the knife. Over the years the actress has reportedly had liposuction, breast implants, and lots of work done on her face. Most recently Demi has corrected her saggy knees. Here's more:

After her flaw was pointed out to her, the mother of three - who is very conscious that actor husband Ashton Kutcher is 15 years younger than her - asked her plastic surgeon to see what he can do.

"Demi went to Brian Novack, who has already done work on her," a source close to the actress said. "He is a fantastic surgeon and his clients don't look like they've had surgery. Demi couldn't stand it that there was any part of her that is not perfect.

"She is also sensitive about her age, although Ashton has told her a million times he doesn't care about what she looks like because he loves her.

"A lot of her friends were trying to talk her out of having more surgery. Worrying about her knees, of all things, is just silly. She's lucky that's the only part of her left to sag!"

Seriously, her saggy knees? Hollywood will think of everything these days. So the grand total of Demi's supposed plastic surgery is over $420,000. Think of all the things you could do with over $400k.