Mrs. Smith was an electric guitarist act from Season 6 of America's Got Talent. She was eliminated before the Vegas Round.
Background
Mrs. Smith is from Minneapolis, as she stated in her audition
Audition
Mrs. Smith's audition in Episode 604 consisted of playing the electric guitar. Sharon Osbourne and Howie Mandel both voted "Yes," (Piers Morgan was not present), sending her to the Vegas Round.
Vegas Round
Mrs. Smith did not compete in the Vegas Round, meaning she was either cut or withdrew before this stage of the competition.