Collaborations reign in this month’s workout playlist. Justin Bieber lent Will.I.Am a hand on the latter’s latest. Italian super producer Alex Gaudino turned the mic over to Jordin Sparks. Lastly, Pitbull and Christina Aguilera urged folks to seize the day–while seizing, for themselves, the hook from ’80s classic “Take On Me.”

This month’s top 10 is interesting for its lack of pop stars. Britney Spears, Flo Rida, and Will.I.Am each turn up in the list. But, they’re in the minority. Put simply, there weren’t a lot of pop songs that came out this month. In their absence, an eclectic bunch of tracks came out of the woodwork: the YouTube smash “Harlem Shake,” Fall Out Boy’s comeback single, and a gritty ode to hell-raising from A$AP Rocky.