Tuhia he haere tonu mo tenei irava - I whakapumautia e Republic Records i te Paenga-whawha 2015 ko te remix o "Bad Blood" ka mahi hei tuawha o nga "1989". Ko te putanga remix e whakaatu ana i te kaiwaiata Kendrick Lamar i tukuna i te Mei 17, 2015, mo te tango mamati na Big Machine Records. I tautokohia te tukunga kotahi e te tuatahi o tana riipene puoro i te 2015 "Billboard" Music Awards
He aha? I pa te "Rau Kino" ki te reo irirangi hit US i te Mei 19, 2015, i raro i te Big Machine me te Republic Records. I tukuna te waiata ki te reo irirangi hit o Itari i te Pipiri 12, 2015, na Universal Music Group.