She kissed a girl and liked it, was cut from Sesame Street, and married a recovering sex & drug addict British comedian.  Katy Perry has been working since 2001, but didn't hit big until just 3 years ago.  In that time, she's carved out her spot as an icon for pop music today.

I Kissed A Girl

Hot N Cold

Thinking Of You

California Gurls

Teenage Dream

Firework

E.T.

Waking Up In Vegas

Last Friday Night

The Infamous Sesame Street Segment