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26 June 2012, 09:30 | Updated: 26 June 2012, 10:04
The 'Boyfriend' star and the chat show host went head to head in a hilarious sketch in the US series.
Justin Bieber was seen putting Jimmy Fallon in a headlock and screaming that he had "Bieber fever" during an "awesome" contest on the comedian's late night chat show in the US.
The 'Never Say Never' singer took on Jimmy in a series of contests to find out who was better then who after they shared words over the success of the pair's albums.
After a deep menacing stare into one another's eyes they went off on their challenges which included holding their breath for the longest, a game of checkers and a press-up contest.
The pair also stopped off for a juice break and one of the final scenes saw Justin lock the host in a headlock to tie up the contest.
A dance contest followed with Justin being crowned the winner as the two shared a special "handhug" which you can see in the picture below:
Justin has just released his new studio album 'Believe' and unveiled a tattoo of the album name during his appearance on the David Letterman show recently.
View a picture of Justin getting Jimmy in a headlock during their skit below:
The 'One Time' singer is also preparing to head out on his new world tour and his manager Scooter Braun admitted that the singer wants to channel Michael Jackson on the outing with lots of pyro and magic being used on stage.
Watch Justin Bieber on the Jimmy Fallon show below: