Justin Bieber made his name with bubblegum pop R&B for the under-14 set. Now he's starting to rap under the "alter ego rap name" Shawty Mane. Check out his "flow".

Sample lyric: "Speaking in tongues Yebedabadaba ba da wa la/I'm killing this caca." Caca!? That's, like, almost a swear! So begins Justin Bieber's "hard" phase. Next thing we know, JB will be rapping about doing lines of Pop Rocks off his marble countertops and downing energy drinks until he blacks out. [via Justin Bieber's Twitter]