Bad Blood (Neil Sedaka song)

"Bad Blood"
Single by Neil Sedaka
from the album Overnight Success The Hungry Years
B-side	"Your Favorite Entertainer" (US) "Hey Mister Sunshine" (UK) "Baby Blue" (Italy)
Released	September 1975
Format	7"
Genre	Pop
Length	3:09
Label	Rocket (US) Polydor (UK)
Writer(s)	Neil Sedaka, Phil Cody
Neil Sedaka singles chronology
"That's When the Music Takes Me" (1975) (US) "The Queen of 1964" (UK) "Bad Blood" (1975) "Breaking Up Is Hard to Do" (1975)

Rocket (US)

"Bad Blood" is a popular song written by Neil Sedaka and Phil Cody. The song, with uncredited backing vocals by Elton John, reached number one on the Billboard Hot 100 in 1975, remaining in 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 1 spot by John's single, "Island Girl".

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Wikipedia