Tusi se faʻaauau mo lenei parakalafa - Republic Records faʻamaonia ia Aperila 2015 o le remix o le "Bad Blood" o le a avea ma lona fa nofofua mai "1989". O le remix version featuring rapper Kendrick Lamar na faʻasaʻolotoina ia Me 17, 2015, mo le digital download e Big Machine Records. Na lagolagoina le tatalaina o le tasi e ala i le premiere o lana musika vitio i le 2015 "Billboard" Music Awards
. O le "Bad Blood" na aafia ai le leitio a le US i le aso 19 o Me, 2015, i lalo o le Big Machine ma le Republic Records. O le pese na faʻasaʻolotoina i le leitio a Italia i le aso 12 o Iuni, 2015, e ala i le Universal Music Group.