Iggy Azalea throws her knickers away after one wear.

Speaking on the Kiss FM radio Breakfast Show, she said: "Every show I get a new pair of underwear. I put it on and then I throw it out after and that's the end."

However, Iggy isn't the only pop star to throw out underwear after a concert as Rita Ora - who teamed up with Iggy on 'Black Widow' - does exactly the same.

Rita added: "We don't see the same underwear twice."

Meanwhile, despite her lavish lifestyle, Iggy - who is dating NBA star Nick Young - insists she likes nothing more than lounging around her house with no make-up on, while wearing comfortable, loose, clothing. She explained: "I like to pretend like I'm working out and just walk around in my joggers, I spend my whole day like that. I have plenty of photo evidence online of me looking like a little boy. Sometimes I don't care and I just take pictures without my make-up on, like at the airport and stuff, and other times I do care. "

Rita, 23, added: "There's nothing better than putting on a pair of sneaks and some tracksuit bottoms."