"Bad Things" is a song by American singer and rapper Machine Gun Kelly and Cuban-Mexican singer Camila Cabello. The song was released on October 14, 2016, and was produced by The Futuristics. Its music video was directed by Hannah Lux Davis and premiered on December 1, 2016. The song features an interpolation of Fastball's 1999 single "Out of My Head". The single peaked at number four on the US Billboard Hot 100, becoming both Machine Gun Kelly and Cabello's first top ten single as solo artists.
The song was nominated for Top Rap Collaboration at the 2017 Billboard Music Awards, and won Best Collaboration at the 2017 Radio Disney Music Awards. During her time as a student at New York University (NYU), American songwriter Madison Love conceived "Bad Things" with several songwriters while she was in a physics class. "Bad Things" is a mid-tempo ballad that interpolates Fastball's 1999 song "Out of My Head". It incorporates lyrical themes of pain-is-pleasure type of love.