Britney Spears doesn't go out in underwear because she "just doesn't like" the feel of it on her skin.

The 'Toxic' singer - who has been frequently pictured in public without panties on - knows it is "stupid" to go out without underwear but just doesn't feel comfortable in it.

Jewellery designer Tuesday Knight, who has been friends with Britney since 2003, said: "Not wearing panties is ridiculous - and I've told her!

"I've said, 'You can't walk into a store wearing ...