Flirty Katy Perry puckers up to a fan on stage in Indonesia amid claims Russell Brand plans to write tell-all about marriage



He inspired the song Firework but Katy Perry is worried Russell Brand will open about their failed marriage, according to a US report.

US magazine Us Weekly claims the singer is concerned by rumours her estranged husband plans to write a third memoir.

Russell already wrote two autobiographies, My Booky Wook and My Booky 2.

Defiant: Katy Perry performed in Indonesia on Thursday night despite reports she is worried about a tell-all book estranged husband Russell Brand allegedly plans to write

The alleged third memoir would supposedly cover the couple’s marriage.

Even though the 36-year-old comedian denies reports he will write a tell-all book, a source claims that Katy is worried.

The person tells Us Weekly: ‘Katy is insulted and feels betrayed that Russell has treated her so poorly. She will never forgive him. Ever.’

Carrying on: Katy left her troubles back home in the US to perform for her fans in Indonesia



Carrying on: Katy left her troubles back home in the US to perform for her fans in Indonesia



The 24-year-old performed in Indonesia on Thursday night, concentrating on her work rather than publicly discussing her marriage woes.



She appeared not to have a care in the world, performing on stage with gusto and even flirting with a male fan.



Katy kissed the half-naked man on stage and he kissed her on her hand.



Showing love: A fan in Jakarta, Indonesia plants a kiss on the singer's hand