Katy Perry is raising money for charity by auctioning off her famous cotton candy stage outfit. 

The star, who wore the pink and red ensemble during dates of her international California Dreams Tour, has put the dress on eBay to help raise funds for the Red Cross.

The bid will run from now (November 10) until Monday, November 14 and the lucky winner will be presented with the stunning outfit backstage at the 'Teenage Dream' singer's concert in Oakland, California. They will also be treated to a meet and greet with Katy Perry herself. 

A message underneath her eBay listing reads: "All proceeds from the winning bid will support American Red Cross Disaster Relief, helping people affected by disasters such as the 2011 spring storms."

Watch her talk about her love of candy colours and sweets below: