Darren Criss begins performances in Hedwig and the Angry Inch on April 29. But before he was slated to take over the role of the transgender rocker, he had the opportunity to surprise some 4,000 youngsters at this past January's Junior Theatre Festival, held annually in Atlanta, GA. In this exclusive peek at his performance, Criss sings "Middle of a Moment" from Benj Pasek and Justin Paul's James and the Giant Peach. See what Criss had to say about prepping for Hedwig.