The new clip shows the Biebs at his infamous Calvins shoot. Instead of the actual model from the ad, roaster Jeffrey Ross plays her role. Sporting a long-haired wig and all, the funny man totally freaks Justin out..and it's hilarious.
"Are you ready?" Jeff asks at the end of the promo. Bieber responded:
Bieber's Roast special airs Monday, March 30, at 10 p.m. ET on Comedy Central. Watch his new promo video, below.