Simon Cowell‘s Helping Haiti single will soon be released globally.

The song - a star-studded cover of R.E.M’s “Everybody Hurts” - will be available to download worldwide starting Sunday to help boost sales and raise relief funds for the earthquake-stricken nation.

The track - which features 21 artists, including Leona Lewis, Rod Stewart, Mariah Carey, Jon Bon Jovi and Susan Boyle - debuted on British radio stations earlier this week and is already poised to be one of the biggest-selling songs in recent years.

“We’re getting record levels of pre-orders for ‘Everybody Hurts,’” a spokesperson for music retailer HMV said. “It is well on course to become a million seller, easily the biggest single for a decade.”

R.E.M. frontman Michael Stipe is thrilled the band - who will relinquish all royalty rights to the record - has been able to help the cause. “We are thrilled the song can help. Thanks from us to everyone involved and everyone who donates,” Stipe said.

Work on the track was completed last weekend after musicians flocked to recording studios in London and Los Angeles to set down their vocals.