Actress Sandra Bullock showed off her Pilates-toned physique in a glittery gold dress at the 2011 amfAR gala at the Chateau Marmont in Los Angeles on Oct. 27.AmFar, the Foundation for AIDs Research, is a nonprofit organization that supports AIDS research and HIV prevention.

Pilates, Kickboxing & Strength Training

The 57″ Bullock, 47, has said she maintains her svelte figure by working out regularly and watching her diet.“I do a lot of Pilates, kick-boxing and weight training in Los Angeles, and when I’m in Austin I run or ride my bike,” said Sandra, who splits her time between L.A. and her Texas ranch.

“If I can work out every day, I will.”

Bullock showed off the results of her hard work in a much talked-about nude scene in the 2009 comedy The Proposal(which co-starred with her longtime friend).

“People ask, ‘How do actresses do it [stay so fit]?’ Um, they pay us to do this in order to look good on film,” she said.