Trey Songz – Na Na (Mankofit Workout Edition)

Summer's around the corner… time to get it right, get it tight!

After "working out" with model Rosa Acosta in the original video for "Na Na," Trey Songz gets down to the nitty gritty in a real workout with celebrity trainer and fitness model Mankofit. The two partner up for some duo workout routines, all while dispaying their impressive physiques.

"Na Na" is a single from Songz's next album due in June 2014.