Demi and Ashton joined newlyweds Katherine Heigl and Josh Kelley and newly-newlyweds Charlie Sheen and Brooke Mueller (who first met at the Butterfly Ball two years ago...awww!) to raise money for a good cause.
Which celeb couple looked hotter on the red carpet - Demi and Ashton or Paris and Benji?
Course, Demi showed off a bit more than her flawless face and happy marriage - click through to see what else she was flashing!
Demi's knees!
Is that a scar from a knee lift or just knee surgery?
SEE MORE:
> Doggy Bag For Kat - Oct 05, 2008> Guess She's Not Preggers - Sep 27, 2008
> Quite The Loose-Fitting Top! - Sep 21, 2008
> Katherine Responds To The Pregnancy Rumors! - Sep 19, 2008
> Another Day, Another Rumor - Sep 16, 2008
See more in the gallery: Stars Fly at Chrysalis' Butterfly Ball!!
