Country stars are known not only for their great songs and huge talent, but also for their generosity. And once again, several of today's biggest stars are making a unique donation for a worthwhile cause.

Guitars of the Stars Benefit Auction, now in its second year, features guitars custom-designed by country stars sold to the highest bidder. This year, all proceeds will benefit the ongoing recovery effort in Music City following the devastating flood.

Artists already signed up to make a contribution include Rascal Flatts, Alan Jackson, Danny Gokey, Chris Young, Jake Owen, Luke Bryan, Darius Rucker, The Judds and Eric Church.

The auction, which will begin with a performance by Chris Young, will also feature a custom guitar signed by artists at the CMT Music Awards.

The auction, part of the CMA Music Fest, will take place on Friday, June 11 at 3:00 PM CST at the Ryman Auditorium. The four-day festival runs from June 10-13 in Nashville, Tenn. Tickets can be purchased here.