By Kati Johnston
Special to MSN Entertainment

In case your New Year's resolutions need some inspiration, look no further than Hollywood. Some of our favorite celebs are as fit and ripped as they come, and while you personally may not need to train, say, to star in "Million Dollar Baby," it can't hurt to take a nod from these stars who really work it, from head to toe.

Usher: Can U handle it? Usher's dreamy vocals are out of sight -- and so are his unbelievably ripped abs. Is that a six-pack, a 12-pack or the whole pony keg? He was once quoted in a TV interview, pointing to the low-ab area, saying, "If you can't see these cuts in your abs, you ain't doing nothing." Usher reportedly does 1,000 crunches a day. Now that's going for the "Burn." (Kevin Mazur/WireImage.com)