Mariah Carey & Leona Lewis are among the artists who have signed on to participate in the Simon Cowell-led charity single for Haiti. The lineup, which also includes Susan Boyle, Alexandra Burke, Cheryl Cole, JLS, Mika, James Morrison, James Blunt, She-Who-Must-Not-Be-Named, & Rod Stewart, will cover the R.E.M. song "Everybody Hurts." Mr. Cowell plans to release the single "next Sunday" (which, due to when the announcement was issued, is unclear in whether that refers to the last Sunday in January or the first one in February). One look at those involved tells you that this is obviously being catered more to the UK audience, but either way, it's still for a good cause!