As part of his whirlwind promotional tour this week, Justin Bieber spent some time with Jimmy Fallon.
But there was no art history mockery involved during this late-night visit.
Instead, viewers were treated to some serious competition between singer and host, as each has come out with a new album and each was set on proving he was more awesome than the other... at push-ups... at video games... at holding one's breath... at dancing.
Who came out on top in this one-of-a-kind Awesome-Off? Watch, find out and then cast a vote below.
WHO DO YOU FIND MORE AWESOME?