“Bad Guy” (stylized in all lowercase) is the fifth promotional single from American singer Billie Eilish. It was released on March 29, 2019, through Darkroom and Interscope Records. The Banger of a Track serves as the fifth single from Eilish’s debut studio album When We All Fall Asleep, Where Do We Go? .
The very successful promo single peaked atop the charts in Australia, Canada, New Zealand, and Norway, and at number two in Ireland, Sweden, the United Kingdom, and the United States, making it Billie’s highest charting single to date