Jessica Biel, the formerly family-friendly star of 7th Heaven, underwent a significant change when she moved from TV to film. Specifically, she started spending a lot of screen time taking off her clothes. After all, this is a babe we often refer to as the Woman With the Perfect Butt, so when she makes that kind of career decision, well, it deserves celebrating. Whether it's onstage stripping and writhing and bending over, or rocking a wet T-shirt and bikini, or slinking around all sexy-like in just her bra and panties -- we have been sufficiently mesmerized.