Love him or hate him, you can't miss "Comedy Central's Roast of Justin Bieber." The tween heartthrob and polarizing pop star volunteered to take the heat this past Saturday, from insult-hurling comics Hannibal Buress, Chris D'Elia, and the night's MC, Kevin Hart. Even Martha Stewart and Shaq got in on the fun (seriously). But what were the best jabs of the night? The Justin Bieber's Roast airs March 30 on Comedy Central.