VIDEO: Justin Bieber Performs His Version of Lady Gaga's "Born This Way"

Ellen DeGeneres decided she could predict what Lady Gaga's upcoming song "Born This Way" would sound like based on the few lyrics that have already been revealed. But first she needed to get James Blunt and Justin Bieber to help!

OK! VIDEO: JUSTIN BIEBER & SELENA GOMEZ'S SANTA MONICA STROLL NOT ALL THE ROMANTIC?

First, Ellen tried it out herself on the piano with a Gaga-inspired costume. Then James tried to help out with his guitar, and finally Justin rocked out on the drums.

Watch the video below!

OK! NEWS: JUSTIN BIEBER RELEASES NEW NEVER SAY NEVER MUSIC VIDEO; SAYS HE WROTE "WON'T STOP"

Of course, Justin also sat and chatted with Ellen about his film, Never Say Never, which opens Friday!

OK! NEWS: SHARON & OZZY OSBOURNE POKE FUN AT JUSTIN BIEBER

But Ellen wouldn't let Justin leave without giving her the birthday present he promised — a lock of his hair!

And finally, Justin also surprised one of his "biggest fans" on the show! And the reaction was so sweet, it brings a little tear to our eyes!