Justin Bieber and One Direction named most powerful under 21s in music

Billboard.com has named Justin Bieber and heartthrobs One Direction as the most powerful under 21-year-olds in music.

The new poll puts the 'Boyfriend' hitmaker in the coveted No.1 position for the second year running and the One Direction lads finished in second place after their debut album, 'Up All Night', was confirmed as the second highest-selling in America so far this year.

Elsewhere in the list, Bieber's girlfriend Selena Gomez made an appearance at No.6 as her career has gone from strength to strength and has seen her design a fashion line, act in movies and release 3 studio albums with her band Selena Gomez & the Scene.

Rapper Mac Miller came in at No.5, former X Factor finalist Cher Lloyd was included at 8, and current X Factor USA judge Demi Lovato scored a high position at No.3.

The full list can be seen here:

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