Justin Bieber Meets 'Worst Nightmare' in New Roast Promo

Comic Jeffrey Ross helps pop star awkwardly reenact Calvin Klein

Justin Bieber already gamely endured an egging and sitting for a new tattoo in anticipation of his upcoming Comedy Central Roast, but can he withstand the taunts and flaunts of wigged comedian and roaster extraordinaire Jeffrey Ross? The show's latest promo spoofs the pop star's recent Calvin Klein ad, in which Bieber played drums and cavorted with a blonde, by once again putting him behind the kit to batter away in black & white as another blonde – Ross – rubs his own gut suggestively and bites his lip to get a rise out of Bieber. "I want you, Justin," Ross says at one point. "I want to stick my pinky in your asshole." In the end, Ross introduces himself as Bieber's "worst nightmare."

The Comedy Central Roast of Justin Bieber will air on March 30th under the guidance of "Roast Master" Kevin Hart. Although the full lineup of roasters has yet to be revealed, Bieber has been using his time until the air date to try and get one comedian in particular to skewer him on air: Seth Rogen. Bieber has been tweeting at the Interview star, asking, "Where are you when I need you?" He also said, "I took it like a man as you blasted a nervous kid fan of yours (me). Now I'm a man. Roast me!"

Perhaps as a way to ready himself for humility, Bieber recently apologized for his rash of bad behavior over the past couple of years. "I didn't want to come off arrogant or conceited, or basically how I've been acting the past year, year and a half," Bieber said in a Facebook video this past January. "I'm not who I was pretending to be."

He also recently told Ellen DeGeneres on her talk show that he's ready to move on from his past. "I think it's cool to laugh at yourself – I've done some things that might not have been the greatest," he said. "I just want to be able to laugh about it, and just kind of own up to some of these things."