Justin Bieber promised to appear on The Ellen DeGeneres Show every week he's in town, so here he is again!

After prank calling a fan on Monday, it was Bieber who got punked today. Ellen asked the pop star about his upcoming Comedy Central roast and asked if he was nervous about what host Kevin Hart might have to say. Ellen said, "He’s the roast master and um, hey, Justin I mean you have to nervous, you have to be scared. I mean right?" And at that very moment, a man dressed as a Calvin Klein Model jumped out to scare Justin. You just HAVE to watch the video above!

In case you missed it, check out the video of the Biebs pranking a fan earlier!