The latest teaser trailer for Justin Bieber's upcoming Comedy Central Roast is a spoof on his Calvin Klein underwear ads. The main difference? The trailer is decidedly NSFW, pretty crude and definitely not something Beliebers of a certain age should be watching.

Decked out a blonde wig and wearing an open button-down shirt, comedian Jeff Ross fills in for model Lara Stone, standing behind Justin, next to Justin and near Justin, becoming increasingly creepy all the while. The very end of the trailer has Justin asking, "Who is this guy?" to which Jeff responds, "Hey man, I'm your worst nightmare. Are you ready?" Justin indicates that he is not.

Justin is the one who encouraged the roast to take place in the first place, and recently took Twitter in an attempt to get Seth Rogen to be part of the special. Reaching out to the comedian, Bieber wrote a series of tweets, pleading with him, "come on man. Check your voicemail. I took it like a man as u blasted a nervous kid fan of yours (me). Now I'm a man. Roast me!" There's still no word as to whether Justin's wish will come true -- Seth has yet to comment on the matter -- but we have to give him major props for going above and beyond.

The roast will air on Comedy Central on March 30, so it's still a few weeks week away. But in the meantime, you can check out the trailer above! Just remember: It's definitely NSFW.

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