6. Hanson, 'MMMBop'
Hanson's 1997 hit "MMMBop" was the big bang of the late 1990s teen pop revival. It was all over radio long before anybody had ever heard of N'Sync, the Backstreet Boys or even (at least in America) the Spice Girls. The song was the debut single from Hanson, a trio of brothers from Oklahoma who had been performing together since they were very young children. Before they knew it, the boys were being mobbed at shopping malls and leaving groups of crying girls everywhere they went. Many see Hanson as a one-hit wonder band, but their fan base has remained incredibly loyal and they continue to play big shows. They even still play "MMMBop," though one imagines that isn't their favorite part of the show these days.