Amy Lynn Hartzler ( nÃ e Lee ; born December 13 , 1981 ) best known as Amy Lee , is an American singer and songwriter , and the lead vocalist and co-founder of the rock band Evanescence . Amy Lynn Hartzler ( nÃ e Lee ; born December 13 , 1981 ) , better known as Amy Lee , is an American singer-songwriter and classically trained pianist . She is co-founder and lead vocalist of the rock band Evanescence .