E. T.(feat Kanye West):
http://www.youtube.com/watch?v=t5Sd5c4o9UM
Firework:
http://www.youtube.com/watch?v=QGJuMBdaqIw
California Gurl(feat Snoop Dogg):
http://www.youtube.com/watch?v=F57P9C4SAW4
Teenage Dream:
http://www.youtube.com/watch?v=41i4uCWST_U
Hot N Cold:
I Kissed A Girl: