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"Justin Bieber has been named the most powerful under-21 in music. The singer fended off competition from One Direction to claim the title, while the British boyband had to settle for second place.   Bieber has had two number one albums in the US over the past 12 months (festive set Under the Mistletoe and recent record Believe), while One Direction&amp;#039;s debut album Up All Night is currently the second highest-selling in America so far this year. The list - compiled by Billboard - places Demi Lovato at three, American Idol winner Scotty McCreery at four and Mac Miller at five. Bieber&amp;#039;s girlfriend Selena Gomez lands at six, while 1D&amp;#039;s fellow X Factor finalist Cher Lloyd ranks at number eight. Elsewhere, Miley Cyrus is placed at number 18 and is trailed by up and coming French DJ Madeon at 19. The Top 10 most powerful under-21s according to Billboard is as follows: 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 Watch the music video for Justin Bieber&amp;#039;s latest single &amp;#039;As Long As You Love Me&amp;#039; below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/music/news/a407122/justin-bieber-one-direction-top-billboards-most-powerful-under-21s/>