Speaking with Billboard magazine she said the lyrics of her song By The Grace Of God was written at a time when she was questioning herself if she should "continue living".
"That song is evident of how tough it really was at a certain point," she said.
The text reportedly sent by Brand to end the marraige is referenced in a song called Ghost with the lyrics "You sent a text… It's like the wind changed your mind".
On a lighter note, here is Katy taking about making her new record:
Isn't she lovely? You just want to be her best mate. Katy, if you're reading this, please can we go for a drink with you?
Prism is available to download 22 October. We're going to buy it, so should you. Until then, this will keep us happy:
SKIP YOUR WAY TO FIT LIKE KATY PERRY
THE OUTDOOR WORKOUT THAT MAKES KATY PERRY HAPPY
WATCH: KATY PERRY PERFORMS WITH ROLLING STONES