American Idol's biggest names are to appear on a series of limited-edition collectable stamps.

Kelly Clarkson, Carrie Underwood and the other winners of the U.S. TV talent show will grace the front of a new set of American stamps, which are being sold for charity.

The net proceeds from the sales of the stamps, which will be issued weekly for the next seven weeks, will go to the Idol Gives Back foundation, which supports charities around the world.

Clarkson graces the cover of the first stamp, which is currently available. The last stamp will feature the winner of the ongoing seventh season of the show.

Only 104,000 stamps will be made available.