Coldplay , Foo Fighters and Red Hot Chili Peppers are among the stars who've donated signed memorabilia to the Grammy Charity's A Little Bit Country…A Little Bit Rock and Roll Auction. Alice in Chains , Death Cab for Cutie and Billy Idol have also donated items to the auction, now live at Ebay.com/Grammy through June 10.

Proceeds go to MusiCares and the GRAMMY Foundation.

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