Stars join Cowell's charity single

Miley Cyrus, Jon Bon Jovi and Mariah Carey have joined the roster of stars participating in Simon Cowell's charity single.

Sales of the track - a cover of REM's 1993 ballad 'Everybody Hurts' - will be used to benefit earthquake relief efforts in Haiti.

"It's amazing these great singers are clearing their schedules to make this happen," Cowell told The Sun, which is helping him organise the single. "I just found out Mariah has changed her schedule to be able to do this too."

Work on the single began in London over the weekend, with X Factor judge Cheryl Cole and Oritse Williams of boyband JLS spearheading the process.

The recording is expected to include stars such as Susan Boyle, Leona Lewis, Rod Stewart, Take That, James Morrison, Mika and James Blunt, among others.