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Updated: Thu, 01 May 2014 18:15:00 GMT
The evolution of Katy Perry

Katy Perry



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She finally hit on a winning formula when she teamed up with superstar writer/producer Dr Luke and produced the track 'I Kissed A Girl'.

In the summer of 2008, she found massive chart success with the infectious ditty, her first single under her newly adopted name.

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