<prompt> Tlatša polelwana e latelago: Republic Records e ile ya tiišetša ka April 2015 gore kopanyo ya Bad Blood e tla šoma e le e tee ya bone go tšwa go 1989. Phetolelo ya remix yeo e nago le rapper Kendrick Lamar e ile ya lokollwa ka la 17 Mei, 2015, bakeng sa go taonelouta ya digital ke Big Machine Records. Go lokollwa ga kopelo go ile gwa thekgwa ke ponagatšo ya bidio ya yona ya mmino ka  <response>: Difoka tša Mmino tša Billboard tša 2015. Bad Blood e ile ya kgoma radio ya mehleng ya US ka la 19 Mei, 2015, ka tlase ga Big Machine le Republic Records. Koša e ile ya lokollwa go ya ka Setaliana ya mehleng ya kgale ya radio ka June 12, 2015, ka Universal Music Group. 