Billie Eilish teases new song 'Because I'm In Love With You'.

Hard at work on her debut album (when she isn't hard at work playing sold-out shows EVERYWHERE), Billie Eilish recently teased a new song (or the beginnings of a new song), 'Because I'm In Love With You'.

Listen to the preview below...

P.S. Order a limited-edition CDM x Billie Eilish zine here!