♪ it's the end of the world as we know it ♪ ♪ i feel fine it was a very appropriately apocalyptic song for what turned out to be a very apocalyptic decade. >> happy new year! >> so we wake up, it's 2000, we're all alive, and we're still in the middle of teen pop mania. ♪ don't want to hear you ♪ ain't nothing but a heartache ♪ >> boy bands were selling so many albums. ♪ every little thing you do ♪ never seems enough for you >> this is the biggest year in pop music history in terms of sales. >> brittney, britney, britney! >> you have britney spears selling 1.3 copies of "oops i did it again." in the first week. ♪ oops i did it again ♪ i played with your heart