Breaking a sweat is easier with a formidable group of pop stars pushing you. This 2016 volume warms up with “Uptown Funk”—Mark Ronson and Bruno Mars' unstoppable ode to classic grooves—and then kicks into gear with a whirlwind of remixes. Hardwell's teeth-chattering treatment of Calvin Harris and Ellie Goulding's "Outside" will have your muscles trembling, while Demi Lovato keeps you "Confident" with her battle cry for self-respect. OneRepublic's inspiring folky romp "I Lived" is exactly the sentiment you'll feel after a killer workout.