"Bad Blood" is a popular song written by #NeilSedaka and Phil Cody. The song, with uncredited backing vocals by #EltonJohn, reached number one on the #Billboard #Hot100 in 1975, remaining at the top position for three weeks. It was certified Gold by the #RIAA and was the most successful individual commercial release in Sedaka's career. "Bad Blood" was replaced at the number one spot by John's #single "#IslandGirl".
https://www.youtube.com/watch?v=_8B5S0j2jTQ