02/06/2013 10:18 am ET Updated Apr 08, 2013

Fitness Instructors Are The New DJs

Devin Murphy loves the new remix of the 1984 Bryan Adams hit "Summer of '69." She didn't hear it on the radio, notice on iTunes or see it on a friend's Spotify page. She fell for it while sweating it out at a fitness class at Barry's Bootcamp.

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