Katy Perry used to pray for bigger breasts.

The 'I Kissed a Girl' singer spent hours during her childhood begging God for an almighty bust.

I look like Rocky. This way I can ensure that everything is firmly in place and I won't have a wardrobe malfunction. Don't want those boulders doing a show of their own!

The 24-year-old star - who now has a sizeable chest - revealed: "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.

"Eventually that request was granted. A bit of divine intervention displays the power of prayer!"

But with bigger boobs, came greater responsibility. Katy is now forced to go through an "intense bouncing routine" before she leaves her house to ensure her "boulders" are not going to pop out of her clothes.

Katy - who has suffered a couple of breast-baring fashion mishaps while on stage - explained to Britain's The Sun newspaper: "Every time before I go on stage, or go out where I know there will be a lot of photographers, I take a skipping rope and spend about ten minutes, fully clothed, skipping.

"I look like Rocky. This way I can ensure that everything is firmly in place and I won't have a wardrobe malfunction. Don't want those boulders doing a show of their own!"