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. **w Bieber has called out Seth Rogen to take part in roasting him.