Aussie singer-songwriter Sia revealed that she actually wanted to quit within an hour of working Katty Perry. "She's quite dominant, and extremely analytical. I actually quit within the first hour of our first session. I was like, 'Can we both agree this doesn't work? Like our whole songwriting dynamic?' disclosed Sia. "And she was like, 'I love it. It's like a puzzle to me. It's like a crossword.' And I was like, 'But this is boring for me. The analysis is totally boring for me. It feels like the enemy of creativity.' But it was so cool to be able to have that conversation on why we wrote in such entirely different ways. I'm glad I didn't give up on it." Sia ended up co-writing 'Double Rainbow', which appeared on Katy Perry's last album Prism.
