“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.

Eilish and her brother, Finneas O’Connell, recently discussed the origin of “Birds Of A Feather” with Audacy. “There’s a lot of songs about dying for somebody and loving them till they die, and I thought it was really fun to reverse it,

Months after releasing her latest album, HIT ME HARD AND SOFT, Billie Eilish has finally released a music video for the biggest song on the record, “BIRDS OF A FEATHER.” While the pop ballad has soundtracked many TikToks and Instagram carousels this summer, it wasn’t until today that Eilish shared her own official visuals for the track.

The iconic siblings revealed bits and pieces from Billie's hit—including lyrics that didn't make the final cut.

He plays the heavily manipulated audio (a “vocal chop,” as Eilish calls is), and Eilish asks Finneas if he has the original sound from which that came. He did and he played it, and it was Eilish singing,

Billie Eilish and Finneas break down "Birds of a Feather," including lyrics that didn't make the final cut, in American Express's "Story of my Song" series.