“Birds of a Feather” is Eilish’s second Pop Airplay top 10 from her latest album, Hit Me Hard and Soft, after “Lunch” reached No. 10 in August. The set, released May 17, has earned 1.5 million equivalent album units in the United States through Sept. 12.

Billie Eilish has achieved that rare form of pop stardom that really everyone aspired to. She is both globally famous, hugely successful and somehow still a mystery. Who is she? No one really knows. And that's a terrific thing.

Billie Eilish just shared a video (above) that superfans are going to eat up: It’s a 16-minute video made in partnership with American Express, in which she and Finneas break down specifics of ...