Katy Perry has received numerous offers from US publishers to write a tell-all book, according to the Daily Mirror newspaper.

The 'Roar' hitmaker has reportedly been offered a deal worth millions of dollars to spill the beans on her career and personal life, including her marriage to Russell Brand, as well as her relationships with Gym Class Heroes star Travie McCoy and John Mayer.

Katy, 29, was supposedly concerned that Brand, her ex-husband, would reveal personal information about their marriage in a book of his own, with a source telling the newspaper: ''Katy thought that Russell was going to tell all about what they got up to in the bedroom - but now she can breathe again.

''Her main cause of concern was there wasn't any post-divorce agreement in place, leaving him to talk about her whenever he pleases.

''However, now the boot is on the other foot because Katy is being offered deals to come out and present her version of events.''

The source added: ''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 bestseller.

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

Russell filed for divorce from Katy in 2011, following 14 months of marriage.