Want a butt like this? Just shell out a few bucks and get yourself The Mari Winsor Pilates for Pink Workout DVD. This is how Bullock tones her behind -- Vanessa Williams does too -- and the bonus in it all is that while you work your magic, you'll also be fighting breast cancer -- $1 from the sale of each DVD (you'll get a resistance band too) will be donated to the Breast Cancer Research Foundation. Perfect timing -- October is Breast Cancer Awareness Month.