Billie Eilish has gone from teen phenom to bone fide adult, according to her brother, producer and collaborator Finneas O’Connell.

The siblings and music collaborators have worked together on the "Birds of a Feather" singer's first three albums.

Ocean Eyes singer, Billie Eilish has planned touring without her brother, Finneas O’Connell for the first time. Recipient of numerous awards, Finneas revealed that, “There were

Billie Eilish and her brother, Finneas, are sitting in a Glendale dressing room, moisturizing after a photo shoot as they laughingly recount the time their dad asked a young Finneas to climb on a chair and snap a picture of his bald spot.