Paul McCartney used to "want sing the world silly love songs". Maybe divorce has made him bitter on that subject and now he focus on "Shrek songs". The former Beatle may also lend his famous voice to a character in the upcoming film.

"Producers want Paul to compose some original tunes for the next one. He could even briefly voice a character. There have been meetings and apparently he's very keen, because his daughter is a fan," the source told UK's Daily Express.