Get ready to burn some calories while having serious fun with this 30-minute Caribbean dance workout. Led by Selena Watkins [1] and based on her Socanomics [2] class, this cardio session will have you moving to the music while toning your abs, booty, and arms. Grab a towel or flag and turn your living room into a dance floor. Just remember: dance like no one is watching . . . or dance like everyone is watching!

If your fitness goals include a flatter belly and stronger core, you're going to need a solid plan, expert guidance, and a little outside motivation. Our 30 Days to a Flat Belly [3] plan has all three! This comprehensive workout plan will give you the results you want without a pricey gym membership; you can do these workouts anywhere — and they're all 30 minutes or less.

Credits: On Selena: Under Armour outfit [4]. On Allie: Terez top [5], Koral leggings [6], and APL shoes [7]. On Christina: Gottex Studio top [8], Lorna Jane leggings [9], and APL shoes [10]. Corkcicle water bottles [11].