Darius Rucker, Carrie Underwood, Josh Thompson, Steve Wariner and Jerrod Niemann are among the stars who have donated guitars for a good cause.

The third annual Guitars of the Stars Benefit Auction, scheduled for June 9 at Nashville's Hall of Fame Park, will raise money for the Opry Trust Fund. The charity assists members of the country music community who are in need.

Many of the acoustic guitars on the block were decorated by the singers themselves. Visual artists Lucie Rice and Cindy Wunsch have also donated guitars they decorated in tribute to various musicians including Rascal Flatts.

Steve and Josh, who will perform at the event, each donated an autographed guitar. Want an autographed copy of one of their latest releases, as well? They'll each do a CD signing at the Opry Originals store in Nashville. Steve will sign his latest album, 'Guitar Laboratory,' from 2:30 to 3:30 PM (CT), and Josh will take his turn at the table from 5:30 to 6:30 PM to sign his album, 'Way Out Here.'

For more details about the auction, signing and other events at CMA Music Fest, check here.