Britney’s latest attempt at helping out mankind could end up being worth at LEAST $20,000. What exactly is going on? Gotta Have Rock and Roll is having a “The Rock & Roll Pop Art Auction.” Items such as Elvis Presley’s Peacock suit, Madonna’s journal, Beatle posters from their early days, stuff from Led Zeppelin, Andy Warhol, Marilyn Monroe and even The Rolling Stones.

As for what Britney is auctioning, her one t-shirt that she wore for the Mickey Mouse Club and signed. She will also have a few other outfits, two that she wore at concerts and one blue and white outfit she woe for the Christmas Pepsi Campaign. To get in on this bidding they start on July 21.