I have just found this:
http://www.youtube.com/watch?v=D5UOUAaOKJ8
Sung at "We Will Rock You" on August 1st at the Canon Theatre.
Guest appearances by Brian May and Roger Taylor from QUEEN, and the Canadian Idol Top 7.
Soloists in order of appearance:
Yvan Pedneault, Erica Peck, Alana Bridgewater, Sterling Jarvis, Suzie McNeil, Evan Buliung.
The Canadian Idol Top 7 includes:
Jaydee Bixby, Dwight D'eon, Carly Rae Jepsen, Brian Melo, Greg Neufeld, Tara Oram, Matt Rapley.
Includes a bit of Brian May's speech at the beginning.