No. 9: Ryan Beatty, ‘U Smile’

It would be blasphemy to say that young crooner Ryan Beatty out-Biebers The Biebs himself, but given that Bieber himself started off his career on YouTube, the comparisons come naturally. Fresh-faced tween Beatty's earnest and heartfelt take on 'U Smile' puts the spotlight right where it belongs: On Beatty's crystalline vocals, which are as clear and sweet as Bieber himself.