© AP/ Justin Bieber
Justin Bieber tops '21 Under 21' list again
Sept. 18, 2012, 6:43 PM EST
Justin Bieber has topped Billboard's
"21 Under 21" list for a second successive year.
Bing: Bieber, One Direction star jam together
Bieber has been named the world's top young musical act, ahead of boy
band One Direction and Demi Lovato.
Rounding out the top five are country singer Scotty McCreery, 18, and rapper Mac Miller, 20.
Bieber's girlfriend Selena Gomez comes in sixth.
Also: Bieber's mom: Selena is 'good for