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Miley Cyrus is causing a sensation — some say a scandal — with the news that she uses a body double as she changes out of her Hannah Montana during her hugely-successful stage show. There’s nothing dishonest about it. It’s a trick of the trade, according to Gary Bongiovanni, editor-in-chief of Pollstar, a trade publication that tracks tour.

It takes a few moments at least to change costumes, and they are trying to do it to give you the almost ‘David Copperfield gee-whiz’ effect,” Bongiovanni told the Associated Press. “There are absolutely laws of physics that prevent you from doing gee-whiz things without some hocus-pocus.

Body doubles. We should all have them.