Katy Perry
Credit: Barcroft/Fame Pictures

Katy Perry was one of the first stars to put an item up for auction on eBay's new celebrity channel, and a lucky bidder just took home her heart-shaped California Dreams tour dress for $8,100. Perry will give the Swarovski-studded pouf style to the winner during a backstage meet-and-greet before her November 21st concert in Oakland, and proceeds from the sale will benefit the American Red Cross. For more charity celeb auctions, check out

Plus, take a look at Katy's most memorable costumes in the gallery!