Record sales are nowhere near what they were 15 years ago, but you still never know when an amazing new talent is going to pop up, where they might appear or which corner of the globe they might hail from.

To help you keep track, Billboard recently put together its latest annual ranking of music’s biggest young stars, or 21 Under 21. This year’s edition has its share of expected names — it won’t surprise you to learn that Justin Bieber topped the list, with Selena Gomez and Demi Lovato making the top 10 — but you might find some unfamiliar faces, too.

Among the international contingent, Billboard named young Latin Grammy winner (and video game star) Miguelito, South Korean pop star HyunA and Australian teen sensation Cody Simpson to the list, as well as British ‘X Factor’ contestants One Direction and Italian opera trio Il Divo.

Plenty of homegrown talent also made the cut, including Willow Smith, in-demand hip-hop producer Lex Luger and the M.I.A.-approved rapper Rye Rye, as well as the 11-year-old ‘America’s Got Talent’ sensation Jackie Evancho. Check out the full list below!

Billboard’s 21 Under 21 for 2011

21. Miley Cyrus; 20. Miguelito; 19. One Direction; 18. Porter Robinson; 17. HyunA; 16. Mindless Behavior; 15. Greyson Chance; 14. Willow Smith; 13. Cody Simpson; 12. Il Volo; 11. Lex Luger; 10. Victoria Justice; 9. Rye Rye; 8. Nick Jonas; 7. Demi Lovato; 6. Mac Miller; 5. Jackie Evancho; 4. Scotty McCreery; 3. Selena Gomez; 2. Tyler, the Creator; 1. Justin Bieber

[Billboard]