Kendrick Lamar Duckworth is an American rapper and songwriter. Often regarded as one of the greatest rappers of all time, he is the only musician outside of the classical and jazz genres to be awarded the Pulitzer Prize for Music. His inclusion of social commentary and political criticism in his songwriting has influenced a rise in social conscience within his generation.

"Bad Blood" is a song by the American singer-songwriter Taylor Swift from her fifth studio album, 1989 (2014). Swift wrote the song with the producers Max Martin and Shellback, and it is a pop song with prominent drums and keyboards. The lyrics are about betrayal by a close friend; many media publications interpreted that the American singer Katy Perry was the subject. A remix featuring the American rapper Kendrick Lamar, with additional lyrics by Lamar and production by Ilya, was released to radio as the fourth single to promote 1989 on May 17, 2015, by Big Machine and Republic Records.