"Lost Cause" is a song by American singer-songwriter Billie Eilish and the fourth single from her second studio album, Happier Than Ever. A soft rock, downtempo, R&B, and jazz song, it incorporates elements from trip-hop and funk music. Its production, which is minimalist, consists of drums, a bassline, synthesizers, and acoustic guitars. Eilish makes use of a crooning vocal style.
