Teenage Dream era wouldn't have been perfect by all the previous #1's without Katy's promotion, now I see
E.T. wouldn't come to #1 without the remix with Kanye West
Firework wouldn't too without her tons of Firework performances during that time
Only Teenage Dream & CA Gurls are the singles that weren't based too much on the promotion
And that explains how Last Friday Night will stuck at #2 without any promotion
