The song is taken from the soundtrack to 'The Devil Wears Prada 2,' which hits cinemas from Friday, May 1.
"Reclaiming the word 'bitch' is power," she says of the track, which references Meredith Brooks' 1997 hit of the same name.
Label founder Matthew S debuts new project Myth Math with lead track "Deep Down," out now.
New album 'Flowers for Men' drops May 8 ahead of her new Netflix drama series 'The Boroughs.'
She also announced that Cat Power will be opening for her show with the Hollywood Bowl Orchestra in LA this September.
It's the second song to emerge from the Stockholm-based artist's fifth album 'ANA', coming later this year.
'Billie Eilish – Hit Me Hard and Soft: The Tour Live in 3D' hits cinemas around the world on May 8.
Watch his performance of "The Rest of Ever" from last night's edition of 'The Late Show with Stephen Colbert.'
The North American leg of the tour starts next week in Austin, TX.
