A deaf singer is moving on to the semifinals of America's Got Talent after delivering a performance judge Simon Cowell calls "one of the most amazing things" he's ever seen or heard.
Mandy Harvey told the judges on the NBC reality competition that she suffers from a connective tissue disorder and she lost her hearing when she was 18. Now 29, the St. Cloud, Florida, resident says she taught herself to sing again using muscle memory and visual tuners.
She interacted with the judges with the help of a sign language interpreter.