The verdict is out on whether or not Justin Bieber has a really big problem on his hands, thanks to none other than Jimmy Fallon and the folks at Late Night - Fallon took to the stage as Bieber to perform "(It's Not My) Baby," a much more enjoyable take on Bieber's 2010 hit, "Baby."

"It's not my baby, baby, baby, no, I'm telling you that's it's not mine," Fallon croons in the vein of a modern day "Billie Jean" or something.

Well, looks like that's settled then!

[Via Late Night With Jimmy Fallon]