Christian Guardino 16-Year-Old Sings His Heart Out And Receiving Golden Buzzer From Howie Mandel November 7, 2024 - by Cubnews - Leave a Comment Christian Guardino 16-Year-Old Sings His Heart Out And Receiving Golden Buzzer From Howie Mandel Christian Guardino 16 Year Old Sings His Heart Out And Receiving Golden Buzzer From Howie Mandel