Abi Carter chats with ET's Denny Directo after winning 'American Idol.' The season 22 finale aired on ABC. The singer shares that her journey on 'Idol' has 'meant the world.' Plus, Abi sings Billie Eilish's praises after receiving a sweet video message of support during the finale. The singer adds that if it weren't for Billie's 'Barbie' hit, 'What Was I Made For?,' which happened to be Abi's audition song, she 'might not be here.'