Britain's first lady of heavy metal, Sharon Osbourne, has assembled an all-star cast to record a charity single of Eric Clapton's "Tears in Heaven."

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Rod Stewart, Katie Melua, Elton John, Mary J. Blige, Gwen Stefani, Pink, Phil Collins, Andrea Bocelli, Robert Downey Jr., members of Velvet Revolver as well as Ozzy and Kelly Osbourne joined voices for the single to benefit Save The Children, the BBC reported Tuesday.

Osbourne started putting the plan together in the wake of the Asian tsunami, but her original goal has since been expanded to include victims of recent hurricanes in the United States and other natural disasters.

"With this single and other relief efforts, our intent is to keep these tragedies at the forefront of everyone's minds," she said. "We must not forget and do all we can to help these people rebuild their lives."

The single is available for download through the 7 Digital Web site.