Updated: Thu, 27 Sep 2012 13:28:14 GMT | By Emma Jones
Katy Perry is Billboard's Woman of the Year

The 'I kissed a girl and diddled her skittle' era

Katy Perry, I Kissed a Girl single (© Capitol Music Group)
  • Katy Perry at the Hollywood premiere of Part of Me 3D (© MARIO ANZUONI/Reuters)
  • Katy Perry, no makeup (© Amanda Edwards/Getty Images)
  • Katy Perry, Part of Me 3D, Christian music (© Paramount/Everett/Rex Features)
  • Katy Perry, I Kissed a Girl single (© Capitol Music Group)
  • Katy Perry poses with spoon after posing with a switchblade (© Twitpic)
  • Katy Perry versus Lily Allen (© Chris Polk/KCA2010; Eric Ryan/Getty Images)
  • Rihanna, Katy Perry (© Kevin Mazur/WireImage)
  • Katy Perry, Hello Katy Tour, 2009 (© PHIL NOBLE /Reuters)
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Coming from a wholesome, Christian background, you have to wonder what moved Katy Perry to pen a track about macking the cherry chapstick off girls. Whether she's actually kissed girls is still up for debate, but according to Perry, it was ScarJo who inspired her hit song.

'I saw a picture of Scarlett Johansson' she told Steppin' Out magazine. 'I was with my boyfriend at the time, and I said to him, 'I'm not going to lie: If Scarlett Johansson walked into the room and wanted to make out with me, I would make out with her.''

The epiphany paid off and, in the summer of 2008, she found massive chart success with 'I Kissed a Girl,' which was released as the first single under her newly adopted name.