I don't own any costumes from famous dancers, but I have borrowed one! Last year at Dance Camp, I was feeling rebellious and didn't bring a costume. However, Bahaia insisted that I dance anyway, so I ended up borrowing Ava's bra and belt set and wore it with a pair of skin-tight jeans and wood-soled platform shoes....
It's one of those things that happens only at Dance Camp...
Here's a link to a pic of the costume I borrowed:
http://www.bellydance.org/galleries/...2/bdor2_02.jpg