Os videos mais vistos de Katy Perry para você ouvir quantas vezes quiser:

E.T :http://www.youtube.com/watch?v=t5Sd5c4o9UM

Teenage Dream: http://www.youtube.com/watch?v=98WtmW-lfeE

Hot N Cold: http://www.youtube.com/watch?v=ms9IxBXuJbs&feature=related

Firework: http://www.youtube.com/watch?v=QGJuMBdaqIw

California  Gurls:http://www.youtube.com/watch?v=F57P9C4SAW4