How much are celebrity boobs worth? Is there a sliding scale? It’s unlikely that Beth Ditto would shell out any money for Katy Perry's assets, but the singer has managed to raise a sizable sum for charity by auctioning off a plaster cast of her breasts. An MTV film crew filmed her being cased in plaster earlier this year.

She agreed to the ordeal to help out cancer research group Keep-A-Breast.org, who auctioned off the plaster cast to raise money for their breast cancer charity. The event didn’t go without a few hitches. According to Perry: "They had to get extra plaster to cast them because they are so big!”

In fact, this isn’t the first time Perry’s boobs have hit the headlines. "I remember really vividly kneeling by my bed as a nine-year-old, saying my prayers and asking God to give me boobs that were so big that if I laid on my back I wouldn't be able to see my feet,” she told The Sun newspaper. “Eventually that request was granted.”

[AngryApe]