Billie Eilish quotes and aphorisms about you Billie Eilish Billie Eilish Billie Eilish Billie Eilish ,, 'Bellyache' is totally fictional. I like writing about things that aren't real. The song is about n... Billie Eilish Billie Eilish Billie Eilish Billie Eilish Billie Eilish Billie Eilish