TAYLOR SWIFT, PINK and KELLY CLARKSON are helping fight global hunger by selling off signed instruments for charity.

The three singers are all offering up autographed guitars to raise funds for the WhyHunger foundation's annual Hungerthon auction, which aims to raise $850,000 to provide food for impoverished families around the world.

Swift's guitar is accompanied by a signed program from her 2011 Speak Now world tour, while singer Tori Amos is auctioning off a signed leather piano bench.

Country star and sports enthusiast Jason Aldean is also joining in by offering up an autographed football.

The Charity Buzz online auctions will come to a close next month December (12).