Katy Perry planning tell-all book?

Los Angeles - Katy Perry is planning to write a tell-all book.

The This Is How We Do hitmaker has reportedly been offered a number of multi-million dollar book deals from American publishers who are convinced her story will be a worldwide hit.

In addition to the breakdown of her marriage to Russell Brand - whom she split from in 2011, 14 months after they tied the knot - they're also hoping she'll spill the beans on her other high profile relationships with John Mayer and Gym Class Heroes star Travie McCoy.

They also believe stories about her childhood would make for great reading as the queen of pop was brought up in a strict Christian family and was initially trying to make it as a gospel singer before becoming a household name with hits such as I Kissed A Girl and California Gurls.

A source said: "Her story and relationships are fascinating to many people in America, from her pop fans, Christian groups and star-loving book readers."

Katy is reported to have been worried that Russell was going to open up about their sex life in a book of his own after he refused to agree to a gagging order in their divorce papers.

However, he's now shelved plans for a third installment of his My Booky Wook autobiography series.

A source told the Daily Mirror newspaper: "Katy thought that Russell was going to tell all about what they got up to in the bedroom ... However, now the boot is on the other foot because Katy is being offered deals to come out and present her version of events."

"She wasn't very kind to Russell when she spoke about him after the split and with her star at such a meteoric height, publishers expect her to be a best seller."

Katy has already released a movie called Part of Me which is an autobiographical documentary that follows her while on tour.