21 UNDER 21

They're young, they're on a white-hot winning streak, and most importantly, they're just getting started: These are Billboard.com's "21 Under 21," selected not only for their tender age but also for their potential to rule the pop culture zeitgeist over the next 12 months.

Whether it's a country star whose every song lyric demands hours of analysis (Is she singing about Joe, Taylor or Kanye?!), a beloved breakout character on TV's hottest high school musical, or a newcomer who landed a record deal on the strength of one Lady Gaga cover, expect them all to to keep us watching -- and listening -- in the year to come. On to the countdown of our picks!

21 UNDER 21 List:

#21 - Sean Kingston

#20 - Cody Simpson

#19 - Nikki Yanofsky

#18 - New Boyz

#17 - Never Shout Never

#16 - Wonder Girls

#15 - Diggy Simmons

#14 - Miranda Cosgrove

#13 - Chris Colfer

#12 - Taylor Momsen

#11 - Lex Luger

#10 - Miley Cyrus

#9 - Greyson Chance

#8 - Demi Lovato

#7 - Willow Smith

#6 - Nick Jonas

#5 - Soulja Boy

#4 - Charice

#3 - Selena Gomez

#2 - Justin Bieber

#1 - Taylor Swift

Source: Billboard

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