Maestro Alexander Bui

Maestro Alexander Bui was a pianist act from Season 5 of America's Got Talent. He was eliminated in the Semifinals.

Background
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Audition
Kristina Young submitted her audition onto YouTube. The audition consisted of singing "Amazing Grace." Her audition was strong enough for the judges to send her to the Quarterfinals along with eleven other YouTube Acts.

Quarterfinals
Kristina Young's Quarterfinals performance consisted of singing "Before He Cheats." She finished in either fourth or fifth place in America's Vote. In the Judges' Choice, although Howie Mandel did not vote for her, Piers Morgan and Sharon Osbourne both did, sending her to the Semifinals instead of Cam Hodges.