Sir Paul McCartney is planning to lay bare his feelings about his bitter divorce battle with Heather Mills on his next studio album. The former beatle split from his second wife Mills in May last year (06) after four years of marriage, and began divorce proceedings in July (06). Now the 64-year-old is set to reveal all to his fans in the follow up to 2005 release CHAOS AND CREATION IN THE BACKYARD, which is scheduled for next year (08). Speaking to British newspaper the Daily Express, a source says, "Paul never stops writing songs and they often reflect what's going on in his life at the time, even during his days as a Beatle. "It's now understood that tracks on his next album will include some direct references to his recent difficulties. He's also said to have written a song to his three-year-old daughter BEATRICE, explaining to her how things turned out the way they did. "Paul has been through a lot in his life and songwriting has long been a cathartic process."