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!
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