“bad guy” is a playful, bass-heavy track that sees Eilish taunting her lover, flaunting her tough nature while questioning his own.It was first proven to exist after Eilish teased a snippet of the track on her Instagram story.In an interview with PopBuzz, Eilish referred to the track, stating she knew from the beginning that “bad guy” would open the album.On the same day as the album’s release, the official music video was uploaded to YouTube. The beginning of the video also contains “!!!!!!!”, the intro of WHEN WE ALL FALL ASLEEP, WHERE DO WE GO?. Billie confirmed that the song would be receiving a music video with a comment on Instagram under a fan post.On August 19th, the song reached #1 on the Billboard Hot 100 making her the first person born in the 21st century to have a #1 and dethroning Lil Nas X’s “Old Town Road”, who held the #1 spot for 19 consecutive weeks. Lil Nas X congratulated Billie on her achievement through a tweet:https://twitter.com/LilNasX/status/1163547042376900610A remix featuring Justin Bieber was released on July 11, 2019.