Lys Agnes was born in Reno, Nevada, to MGM's "Hello Hollywood Hello" principal singer, Diane Petersen. During her childhood, Lys attended many of her mother's performances until the show's close, but no one knew of her own singing abilities until her mother came upon her hiding in the basement singing into a little tape recorder, playing it back to herself to hear how she sounded.
Upon entering high school, Lys became the National Anthem singer for the school's basketball games. After graduating, Lys chose different paths, eventually ending up at a university to study music. She chose classical guitar as her focus but quickly discovered her operatic voice while fooling around transcribing operatic arias to her guitar.
Lys fell in love with the operatic sound but could not get her heart into the operas. She continued to build her operatic repertoire until suddenly Lys' fiancé was tragically killed in a car accident while in the U.S. Virgin Islands. As a consequence, Lys gave up her music and vocal studies for the next two years. She took odd jobs to get by, but finally discovered that, while still in mourning, her life was slipping away and her talent lay dormant. With a "carpe diem" sense of urgency, she abruptly quit her retail job to fully pursue her singing career by auditioning for America's Got Talent. 1
Lys Agnès's Quarterfinals performance in Episode 617 consisted of singing "Habanera." She received enough votes to send her to the Semifinals in Episode 618 instead of Captain & Maybelle, Mauricio Herrera, and Monet.
Lys Agnès's Semifinals performance in Episode 625 consisted of singing an operatic version of "Bring Me to Life". She received enough votes to send her to the Finals in Episode 626 along with POPLYFE.
Lys Agnès's Top 10 Finals performance in Episode 629 consisted of singing "Dream On." The act did not receive enough votes to finish in at least fourth place in America's Vote, eliminating her from the competition in Episode 630 along with Miami All Stars.