Towards the end of her 2015 album Honeymoon, Lana Del Rey sings on ‘The Blackest Day’ that “All I hear is Billie Holiday, it’s all that I play”, but more recently, she has acknowledged that ‘Lady Day’ is no longer the only Billie whose music she can’t stop listening to. When Honeymoon came out, the world was in its last few months of pre-Billie Eilish fame. In November of that same year, the then-13-year-old Eilish posted the stunning ‘Ocean Eye…