Well of course I had to answer Dotty's post with this one. It's pretty cool.
The youtube description says,
"I found the BEST rendition of O Canada - the True North Strong & Free's wonderful National Anthem on an old VHS tape in my basement. An initiative by broadcaster Ross Carlin of Orangeville, Ontario, this was apparently produced for distribution to over 14000 schools across Canada. Sung in both official languages, the clip features over 240 voices representing the musical & cultural diversity of Canada. Made over 15 yrs ago, you might recognize a few faces- like: Rita MacNeil, KD Lang, Murray MacGlaughlin(sp), Luba, Fresh Wes; Tommy Hunter, Gino Vanelli, etc."