Leona`s next album a venomous ode to her ex

London: British popstar Leona Lewis is venting her anger against ex-boyfriend Lou Al-Chamaa in her upcoming album.

The singer is going all out for revenge against her childhood sweetheart with some very strong lyrics, reported Daily Mirror online.

Lewis, 26, was with Lou for over ten years and things ended very badly last August.

The star who became an overnight success after the release of her debut album `Spirit` in 2008, has co-penned a track called `Trouble` which talks about her split.

"But what you live through makes you stronger, and Leona`s throwing all her emotion into the music she`s working on. She means business. This album needs to be daring and innovative," said a source close to Lewis.

Music manager Lou too has strong words of his own.

"Tired of being walked over. This has been going on now for over seven months. Silence is no longer golden," he tweeted last week.