Katy Perry wrote her hit song I KISSED A GIRL to rebel against her strict religious childhood.
The star's mother is an evangelical Christian preacher and has admitted she isn't a fan of some of her daughter's outrageous lyrics, which she has branded "shameful".
She was banned from swearing as a child and followed strict rules as she grew up - so she wreaked revenge with the controversial lyrics to her breakthrough hit.
Perry says, "My religious upbringing was comically strict - even the Dirt Devil vacuum cleaner was banned. In our house, no one was allowed to refer to devilled eggs. We had to call them angelic eggs.
"We were never allowed to swear. I'd get into trouble just for saying 'Hell no'. If you dropped a hammer on your toe in our house you had to say something like 'Jiminy Christmas'. The only music we were allowed to listen to was gospel. No wonder I rebelled."