Update! She did it again. Grace VanderWaal, daughter of LG exec Dave VanderWaal, performed another original song, "Light The Sky," during the "America's Got Talent" semifinals Tuesday night. She killed it, and the accolades followed. "You are the real deal," said judge Heidi Klum. Judge Simon Cowell called her the "new generation" while Howie Mandel gushed, "you can win this." Wednesday night she found out she's off to the finals based on America's voting.