Kammala jumla mai zuwa: Republic Records ya tabbatar a watan Afrilu 2015 cewa wani remix na "Bad Blood" zai zama na huɗu daga "1989". An sake sakin sigar remix tare da rapper Kendrick Lamar a ranar 17 ga Mayu, 2015, don saukar da dijital ta Big Machine Records. An fitar da fitowar guda ɗaya ta hanyar gabatar da bidiyon kiɗa a
Kyautar Kiɗa ta "Billboard" ta 2015. "Bad Blood" ya shafi rediyo na zamani na Amurka a ranar 19 ga Mayu, 2015, a ƙarƙashin Big Machine da Republic Records. An saki waƙar zuwa rediyon Italiyanci na zamani a ranar 12 ga Yuni, 2015, ta hanyar Universal Music Group.