Good Morning America star Amy Robach was a proud mom on Tuesday as she shared the wonderful news that her daughter would be performing live in New York City.MORE: Inside GMA stars incredible homes - Amy Robach, Robin Roberts and moreAva, 18, is a student at the Tisch School of the Arts and will perform at the city's Bitter End on Bleecker St on 15 October.WATCH: Amy Robach shares sneak peek inside her incredible home as she gives it the ultimate makeoverThe teen shared the news on her social