Justin Bieber Apologizes For Bad Boy Ways At Roast: "I'm Disappointed In Myself"

After being hysterically whupped tonight at his Comedy Central Roast, Justin Bieber showed he could dish it back to Martha Stewart and comedienne Natasha Leggero with some dirty jokes. He even told roast guru Jeffrey Ross, “You look like the emoji you send when you want to tell someone you have food poisoning.” But then Bieber got serious and apologized to the crowd for his bad boy shenanigans throughout the years. The dais arrested Bieber tonight for such hijinks as…