I’d really like us to work with her.” Perry told crowd members at what appeared to be an intimate gig: “It was a song called ‘Ocean Eyes’ and it was just a blonde girl, and I was like ...

In 2015, Billie Eilish was only 13 when she released her first song, “Ocean Eyes,” a bedroom pop ballad, produced by her brother, co-writer, and collaborator Finneas O’Connell, on SoundCloud.