As previously reported, Justin Bieber has signed himself up to be roasted on Comedy Central for his 21st birthday. Following more than a year of shenanigans, Bieber has decided to own up to all the things that have made him seem like a d-bag and bad example to his Beliebers. Earlier this month, Comedy Central posted a trailer for the March 30th roast, which featured the 20-year-old Canadian crooner topless and getting pelted with eggs. Now Bieber has called out Seth Rogen to take part in roasting him.

"@Sethrogen all I want for my birthday is for you to roast me. I took the twitter bashing please make my bday and do it in person. Thanks," he wrote, adding in another tweet, "@Sethrogen I would have emailed u but this is the only electronic communication with u that doesn't scare me. Hope to see u at the roast :)."

Bieber's beef with Rogen goes back to January 2014 when he expressed his hatred for the singer on Twitter by posting, "All jokes aside, Justin Bieber is a piece of s--t."

After that, he defended the tweet on Bravo's Watch What Happens Live with Andy Cohen, and a few months later he spoke about it again on the Howard Stern Show.

"[Justin Bieber is] a good example of someone you meet, who you think you're going to hate, and then you get to hate him as much as you thought," he told Stern. "You meet him, and he lives up to every one of your expectations of how you hope he will be."

He went on to explain that he'd met the pop star when they both appeared on a German talk show and Bieber had asked to meet him.

"And it was weird, I was like, 'Sure, I'll meet him.' So I went outside to meet him and he was acting like I asked to meet him," Rogen recalled. "It was very nonchalant, 'Yo man. Wassup,' and I was like, 'What the f**k, I don't give a f**k about, I don't want to meet you. Don't act all nonplussed to meet me. I didn't want to meet you. I was totally cool not meeting you... But I was like, fine, I wouldn't have said anything, I was like, 'He's a bit of a motherf**ker. Whatever. He's young, the kid's a dick.'

"And then I met him like two years later maybe, I saw him again at an MTV Awards show and he literally had a snake wrapped around his fucking wrist that he was wearing as an accouterment and I was like, 'What the f**k,' and I talked to him for like five minutes and I was like, 'F**k this kid.' He was trying to be funny with like, 'Hey this snake.'"

It didn't end there. Rogen also mentioned Bieber again on The Today Show and The Daily Show before Bieber decided to respond.

"Seth Rogan sorry I didnt bow down when I asked 2 meet u was probably a bit shy and didn't want to be over the top but still. love ur movies," he tweeted.

No word yet on whether Rogen will accept the roasting offer.

However, Bieber recently spoke about his decision to be roasted in an appearance on Ellen.

"I think it's just cool to like be able to laugh at yourself, you know," he told Ellen Degeneres, who refused to be a part of the roast when asked by Scooter Braun. "I've done some things that might not have been the greatest. I just want to be able to laugh about it and kind of just own up to some of the things."

Besides egg jokes, you can expect jokes about that DUI arrest, his music, his dancing, the Beliebers, the drugs, the hair, the Calvin Klein ads, the selfies and, well, anything else vaguely lampoonable.

"Justin has been asking us for a few years to roast him, and we just kept telling him to go create more source material first. We're thrilled he listened," Kent Alterman, President of Comedy Central's Content Development & Original Programming, said in a statement.

This roast is sure to be epic. Don't forget to tune in on March 30 for the event, which will be hosted by Kevin Hart.

Meanwhile, on the music front, Bieber was recently featured on the new song "Where Are Ü Now" off Jack Ü's latest release.

Would you like to see Rogen roast Bieber? Sound off in the comments section below!

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