Gwen Stefani, Elton John, Rod Stewart, Velvet Revolver, Ozzy and Kelly Osbourne are among the stars set to appear on a new single to benefit tsunami relief in Southeast Asia.
MTV.com reports that the stars will record a cover of Eric Clapton's 'Tears in Heaven', with proceeds going to the Disasters Emergency Committee's Tsunami Earthquake Appeal.
The song will be recorded on two continents, with sessions beginning in London on Thursday and continuing in Los Angeles, New York and Boston.
Other artists who will appear on the track are Robbie Williams, Pink, Andrea Bocelli, Aerosmith frontman Steven Tyler and Josh Groban.