Katy Perry pens down lyrics about split

London: Singer Katy Perry has been writing lyrics about her split from husband Russell Brand for her next album.

"Ever since problems started to emerge, she penned her thoughts in a diary which she goes back to, to draw upon for lyrics for her songs," contactmusic.com quoted a source as saying.

"She has always said that writing is almost a form of therapy for her and she would often be found in her dressing room on tour writing in her diary. She spent a lot of time in Hawaii over Christmas writing lyrics to two of her latest tracks," the source added.

Brand filed for divorce from Perry citing "irreconcilable differences" in the last week of December.