The queen of pop turns 55 today! What better way to celebrate Madonna's special day than by jamming out to her biggest hits? The superstar's tunes have been on blast today at the OK! office and we're loving it! Check out the amazing playlist below and don't forget to tweet the singer a very happy birthday on Facebook.
Did you jam out to our collection of Madonna's biggest hits at the gym? Tell us below and on Twitter @OKMagazine.