Justin Bieber sings Katy Perry’s Teenage Dream on Ellen

Justin Bieber crashed Ellen today and took over the show as the teen star is known to do.  He interrupted the monologue while Ellen was pushing copies of her girlfriend Portia De Rossi’s book Unbearable Lightness with a copy of his own book First Step 2 Forever in hand.  Ellen had him sign it then they did a dance together through the crowd to Usher’s “Yeah.”

Later Ellen sat down with Justin and  discussed an array of topics including bullying and Selena Gomez.  Bieber even took the time to teach Ellen the Doug E dance.  The highlight of the video, however, is Justin singing an impromptu portion of Katy Perry’s “Teenage Dream” with help from the audience.  Here’s the clip (cue insane screaming):

“Everybody goes through bullying. Everybody has, even me. On my YouTube page, there are so many haters. They just say crazy stuff. I’m not mad, I’m 16 and I don’t have chest hair. I’m not angry about it at the moment. That will come. People are like, ‘Look at him, he puts helium in his voice before he sings.’ You just have to laugh at yourself. It’s funny.” – Justin Bieber

I don’t mean to front on Katy Perry-Brand but I think Justin may sing “Teenage Dream” better than she does!  And yes chest hair will come Justin, just pray it doesn’t become a man sweater.