The pair - who appeared on four tracks on the British star`s debut record `3 Words` - are said to have secretly laid down a number of tunes while the 27-year-old beauty was in Los Angeles earlier this month. An insider revealed: "Will can`t contain his excitement over the new stuff. He reckons the tracks will be even more successful than her first batch of solo tunes. He had a long recording session with Cheryl in Los Angeles last week and was gushing about it to a pal." The Black Eyed Peas hitmaker - who is also working on recording his second solo album - also found time to appear with the `Fight For This Love` singer to help film part of her TV talent search series `The X Factor` in England, despite his "crazy schedule". The source added to the Daily Star newspaper: "Will was so excited about joining her for the `Judges` Houses` stage of the competition he changed the airline he was travelling on so he could get to the UK a couple of hours sooner. "Will`s a very busy man and he thrives on it. But he always manages to find space in his crazy schedule when it comes to Cheryl. They`re great friends and he relishes making music with her." `Messy Little Raindrops` is thought to be scheduled for release before the end of the year.