"How Long" Will We Dance to Charlie Puth With The Fitness Marshall? Infinitely.

If you peeped Charlie Puth's Instagram Story over the weekend, you may have noticed some familiar faces! The Fitness Marshall's latest video is to Charlie's new hit, "How Long." Needless to say, we're going to be dancing to this infinitely.

You may have also noticed a surprise guest backup booty! That's Will Ontiveros from season one of Revenge Body. Lookin' good, Will!