Hmm let me think...

The Party
Puffy Amy Yumi
Shonen Knife
Me First and the Gimmie Gimmies
kmi Stockwood
Jann Arden
O- Town I can't believe I admitted to that one.
Bing Crosby
New Kids On The Block (You know Joe Joe...)
Pizzacato Five
Bare Naked Ladies

There's more but well I really don't think a lot of people would know who they are and well it would just get disturbing I think. Then again I think there might be a few on the list already that will confuse people.