Alex really showed off his musicality during his performance of "Fairytales." The judges were impressed with his authenticity. "You've stayed true to yourself. You've grown and gotten so comfortable," said Jennifer Lopez. Harry was all praise for Alex as well saying that he really "enjoyed the arrangement" and the vibrato. Keith thought Alex did a "great job" and noted that a lot of people in the audience were singing along to the original song! A "Fairytale" indeed.