Katy Perry's breasts sold for $3,000 for a cancer charity - ok they didn't. But the plaster cast of her breasts did.

The lucky bidder took home the plaster mould which the singer used last year while MTV cameras recorded the event for breast cancer research group Keep-A-Breast.org.

"They had to get extra plaster to cast them because they are so big!" Perry said of her boobs getting moulded. Classy.

[via AnythingHollywood]