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Justin Bieber has allegedly rules the annually list for two consecutive years with has toured around the world and released two albums “Under the Mistletoe” and “Believe” that seeded chart-busting single “Boyfriend.”
The 18-year-old Canadian pop-star hailed as the hottest teen musician of 2012 by Billboard in the past 12 months. The “One Direction” boys make their debut on the Billboard’s list by following Bieber at the second position. The boy-banders take the U.S. by gale with their music in debut album “Up All Night“, making history by achieving No. 1 on Billboard Hot 200 and ruling 2012 MTV Video Music Awards with a total of three awards.
Demi Lovato is the third place in the music minor under 21 list. The 20-year-old former Disney star is applauded for her triumphant struggle against her inner demons. Other teen stars making the top-10 list that included – Scotty McCreery, Justin Bieber’s girlfriend Selena Gomez and many more.
Check out the Billboard’s 2012 edition of 21 Under 21 list:

1. Justin Bieber
2 .One Direction
3. Demi Lovato
4. Scotty McCreery
5. Mac Miller
6. Selena Gomez
7. Porter Robinson
8. Cher Lloyd
9. Earl Sweatshirt
10. Nick Jonas
11. Jackie Evancho
12. Cody Simpson
13. Mindless Behavior
14.Megan & Liz
15. IU
16. Bridgit Mendler
17. 3BallMTY
18. Miley Cyrus
19. Madeon
20. Ross Lynch
21. Victoria Justice
Tags: Billboard List of 2012, Billboards Hot 2012, Justin Bieber, Justin Bieber -Boyfriend, Justin Bieber Believe, Justin Bieber Under the Mistletoe, Justin Bieber's girlfriend Selena Gomez, Scotty McCreery, Under 21