“bad guy” is a playful, bass-heavy track that sees Eilish taunting her lover, flaunting her tough nature while questioning his own. "Bad Guy" (stylized in all lowercase) is a song by American singer Billie Eilish. It was released on March 29, 2019, through Darkroom and Interscope Records.[2] The song serves as the fifth single from Eilish's debut studio album When We All Fall Asleep, Where Do We Go? (2019), as confirmed by Billboard.[2] The music video was also released on March 29. The son