This time, Justin Bieber was back on his drum set, but model Lara Stone was replaced by Roastmaster General Jeffrey Ross -- shirtless and in a long blonde wig.
Most of the promo involves Ross inappropriately stroking his stomach while a confused Bieber tries to keep him away.
"Who is this guy?" Bieber asks to his people off-screen.
"Hey man," Ross says, shaking Bieber's hand. "I'm your worst nightmare. Are you ready?"
"No…," a scared Bieber responds.
Bieber's appearance on the Comedy Central Roast is one step on the star's road to PR recovery after a high-profile year of legal troubles.
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