I know everyone is doing a tribute, but I find that I can't help myself.  If you love music, it's hard to avoid and even kind of cathartic to put together.  He made such an impact to the world through his music, dance and even his crazy shennanegans.  This is a huge blow to the heart of music.  I can't fully express just how much he will be missed...

A compilation of my faves with covers, originals and remixes:

Jason Mraz & Nikki Spelen - Billy Jean
Michael Jackson - PYT Marquis remix
Ben Gibbard - Thriller
Jackson 5 - I Want You Back
Michael Jackson ft. Will.I.Am - The Girl Is Mine
The Jacksons - Blame It On the Boogie
Michael Jackson - Rock With You 
                          Billy Jean 
                          Don't Stop 'til You Get Enough 
                          Black or White 
                          Thriller 
                          Bad

These guys are fairly new and fairly awesome!  I came across them walking past a concert on Dundas Square (couldn't stay since I was heading out to see Year One) and the vocals just hooked me in.  Bands usually lose me with poor vocal chops, but Lucas has a pretty sweet voice.

Dirty King (Dirty King)
Oh Yeah (Snake House)
Cry Me a River (Justin Timberlake cover) (Snake House)

BENJI HUGHES.  Hate his facial hair.  LOVE his voice.  He has such a sweet laidback voice, mellow and a little blues-y.  I'm in love with: You Stood Me Up => http://www.youtube.com/watch?v=TgqOeAPChwo   
Girl in A Tower showcases his voice more though...