Baring your butt on stage for all the audience to see is pretty powerful motivation. Michelle Williams, formerly of Destiny's Child, had to reveal her rear during a scene in The Color Purple. She worked with a trainer to get her body in shape so that if anyone was shocked, they were shocked at how great she looked.

Williams kept up the workouts after her run in the play was over. Good thing, too ... I'm sure her fitness level will come in handy while performing songs from her new album, Unexpected. Besides the rigors of her performing schedule, Williams just plain feels proud of her physique. She says "I'll be brushing my teeth, see my arm in the mirror and think ... cool."

Even if your job isn't as revealing as Williams' (and I certainly hope it's not), you can take some tips from her workout. Her strength and toning routine uses resistance bands and dumbbells.