Republic Records confirmed in April 2015 that a remix of "Bad Blood" would serve as the fourth single from "1989". The remix version featuring rapper Kendrick Lamar was released on May 17, 2015, for digital download by Big Machine Records. The single release was supported by the premiere of its music video at the 2015 "Billboard" Music Awards. "Bad Blood" impacted US contemporary hit radio on May 19, 2015, under Big Machine and Republic Records imprint. The song was released to Italian contemporary hit radio on June 12, 2015, through Universal Music Group.