In 2007 we saw celebs, some more than others, really shaping up their bodies. From John Mayer [1] to Tyra Banks [2], stars are finding themselves in health clubs instead of night clubs and we couldn't be happier.

Jessica Biel [3] was named your favorite fit female [4] for a reason — she's always active. In 2007 we got the scoop from her trainer [5] on her workout [6], which includes warming up with a walking lunge [7].

Speaking of Jessica's, Jessica Simpson [8] attributed her newly toned-up body to 5-Factor Fitness [9] and Fuze [10]. She's even been sporting those coveted Nike Tempo Shorts [11] we all love.

Reese Witherspoon [12] also got us talking about fitness. From her daily jogs [13] to her intense workouts in the park [14] to her workout play list [15], Reese's workout details were ones that we all wanted to know.

Pacific Coast News [16]