"As a dancer, I have to keep my core strong," says the Dancing With the Stars champion. To do it, she works out at least five days a week—often with Adam Ernster, her Los Angeles-based trainer. During their 60- to 90-minute sessions, the duo does circuits of three or four strength moves with limited rest in between, plus plenty of cardio. On her own, Nicole runs and follows a no-gear abs routine.
The Nicole Scherzinger Workout:
Do 2 or 3 sets of each abs exercise three times a week.
You'll need: A 6- to 12-pound Body Bar and a resistance band or tube. Find gear at spri.com.