We may have X Factor back on our screens in the UK...but after seeing this I'm wishing we had America's Got Talent instead. This is worth watching just for the look on Brandy's face during the performance. As my friend said when she emailed this over to me, "I wish I could get ready this quickly!"
ps. If you want the mystery ruined, there are 300-odd people discussing how it was done on the YouTube comments page. Spoilsports.
