Ku qor sii wadida cutubkan - Republic Records waxay xaqiijisay bishii Abriil 2015 in dib u habeynta "Bad Blood" ay u adeegi doonto sidii afaraad ee "1989". Nooca remix-ka oo ay kujiraan fanaanka Kendrick Lamar waxaa la sii daayay May 17, 2015, si loogu soo dejiyo dijitaalka Big Machine Records. Waxaa lagu taageeray sii deynta hal-ku-dhegga iyada oo lagu soo bandhigay muuqaalkeeda muusikada ee 2015 "Billboard" Music Awards
Waxaad "Bad Blood" waxay saameyn ku yeelatay raadiyaha hit-ka casriga ah ee Mareykanka bishii Meey 19, 2015, iyada oo hoos timaad Big Machine iyo Republic Records. Heesta waxaa loo sii daayay raadiyaha hit-ka casriga ah ee Talyaaniga Juun 12, 2015, iyada oo loo marayo Universal Music Group.