The official description from Disney is:
For one week only, Limited Time Magic will be transforming pop star fantasies into real-life dreams come true for a few lucky Guests, ages 6 to 13. Just like the television show, it all begins with an a capella performance of a popular song. And with the right kind of energetic impression, they’ll set off for the next exciting round. So start those vocal warm-ups and help get that voice ready to shine—the opening audition is just the beginning!