The Music Man

Ari has suddenly revealed his musical side.
Play any sort of music and more often than not, he'll do a little bounce (bending knees) or a little dance. I've even seen him sway from side to side and clap hands to music.
As a parent who would LOVE her child to be, at the very least, passionate about music and, at best, a famous rock star, this is good news.
But how to harness and encourage our little music man?
Adopt a Motown-like intensive program to produce our own Little Stevie Wonder or Michael Jackson (the ABC one, not the freaky white-faced one)?
Succumb to the commercial lure of The Wiggles or Hi-5?
I'm exploring classes such as Kindermusik and Mini Maestros to see if Ari will like them. But I'd welcome any suggestions...