Justin Bieber beats Jimmy Fallon in 'awesome' battle - video
The 'Boyfriend' singer took on the host in a skit ahead of his guest spot on Fallon's Late Night show last week.
The pair battle each other in a quest to find who is the most "awesome" in the clip.
After playing laser tag, rock-paper-scissors and doing push-ups, Bieber gets Fallon in a headlock and demands that he declares: "I've got Bieber fever!".
Bieber ends up winning a dance-off, before they give each other a "hand hug".
The teen idol beat Cheryl Cole in this week's UK album chart race, with his album Believe reaching the top spot by just over 3,000 copies.
He was recently teased by chatshow host David Letterman about his latest 'Believe' tattoo.