1: 1. Katy Perry changed her name from Katy Hudson to avoid confusion with actress Kate Hudson.

2: 2. Perry holds the record for most Twitter followers and is known for her colorful outfits.

3: 3. She once worked as a backup singer for Christian artist Jennifer Knapp.

4: 4. Perry's song "I Kissed a Girl" was inspired by her own experiences.

5: 5. She is the first female artist to have five number one singles from the same album.

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