Katy Perry has reportedly been offered $3.1million to write a tell-all book
The former couple split in December after just 14-months of marriage, with Russell, 36, filing for divorce citing "irreconcilable differences".
Both have maintained a dignified silence since their separation, but three publishers are now said to be competing to get 27-year-old Katy`s side of the story.
A source said: "When everything was going well, Katy couldn`t stop talking about him.
"Since the split neither of them have said anything - keeping the price of a deal high."
Meanwhile, Katy is rumoured to have moved on with 22-year-old Chanel model Baptiste Giabiconi- who she was spotted "flirting" with at Paris Fashion Week.
One person said to be thrilled about the love match is the fashion house`s creative designer Karl Lagerfeld, who is believed to have played cupid between the two.
A second insider told The Sun newspaper: "Karl has a father and son relationship with Baptiste - he discovered him in 2008.
"He told Katy that Baptiste would be perfect for her and he was right as the pair hit it off straight away."