many albums. ♪ every little thing i do ♪ never seems enough for you >> this is the biggest year in pop music history in terms of sales. >> bright nii, britney, britney! >> you have britney spears selling 1.3 million copies of "oops i did it again." in the first week. ♪ oops i did it again ♪ i played with your heart ♪ got lost in the game ♪ oh baby baby >> everybody's falling in love with boy bands and girl groups. but then justin timberlake leaves 'n sync. ♪ ♪ i want to rock your body >> with his debut album j.t. established what his sound would be and it's instantly appealing to a pop audience and also an r&b audience. ♪ cry me a river ♪ cry me a river >> you know, justin timberlake leaving 'n sync becomes the