Click subscribe for more incredible Halloween tutorials! No topics were off limits at Justin Biebers Comedy Central roast in LA on Saturday.<br>No topics were off limits at Justin Bieber s Comedy Central roast in LA on Saturday. Although the singer took most of the jabs in stride, laughing along with the .<br>Jeff talks about what he did to prepare for The Comedy Central Roast of Justin Bieber and recalls asking Selena Gomez for advice. SUBSCRIBE to get the latest .<br>No topics were off limits at Justin Biebers Comedy Central roast in LA on Saturday. Although the singer took most of the jabs in stride, laughing along with the .