Ready to get your heartbeat up? Britney Spears never goes out of style in my book. Fit in some cardio today to her classic “I’m A Slave 4 U” as I guide you through a dance workout.

WATCH MORE: Britney Spears Toxic Cardio Workout
WATCH MORE: Rihanna S&M Cardio Workout

*This video was originally published on The Fitness Marshall’s Youtube channel. For more workout videos visit www.youtube.com/user/TheFitnessMarshall.