Perry 'judges stage wear by jumping'

Katy Perry has revealed that she ensures that her breasts don't fall out of her stage dresses by skipping around in her outfits before a show.

According to The Sun, the 'I Kissed A Girl' singer has named her 32DD boobs 'The Twins'.

Perry told her Twitter followers: "Usually I test out an outfit b4 shows by jumpin' rope, make sure the twins r gonna stay in the holder (sic)."

She added that she was nearly exposed at a concert in Arras, France, saying: "I didn't test. Almost had a SHOW!"

Perry recently said that she converted boyfriend Travis McCoy into a "boob guy".