Watch America’s Got Talent Season 5 Episode 30 Online

The sisters sang their hearts out tonight as they mentioned in their pre-performance segment. Christina's really bloomed as a singer and got rave reviews from the judges. She would do great as a solo artist. Ali was good, but she seemed insecure while singing and moving at the same time: It didn't look natural enough. As the judges said, the sisters have contagious smiles and nice voices