According to The Sun, the 'My Own Monster' chanteuse has signed a deal to write the book equivalent to last year’s biopic Katy Perry: Part of Me.
A 'source' explained: "Several publishers have been after Katy for a while. She decided to go ahead so fans don’t have a one-sided story when Russell publishes another Booky Wook."
We assume that Katy Perry is writing this book just for the 'fans' and not the £2m The Sun claim she’ll receive for writing it.
Either way it should make for a good read.