A Colorado jazz singer is completely deaf. Mandy Harvey of Fort Collins has been singing since the age of four. During her first year of studying music at Colorado State University, Harvey began losing her hearing. Eventually, hearing aids didn't help. After a year away from music, she decided to try singing again - only this time by watching piano keys and sings the notes from memory without the benefit of hearing. She's able to stay in pitch because of muscle memory that was developed over the years. She now has an album available called Smile. Read more about the album and Mandy Harvey here.