Question: What nationality is the performer of song Bad Blood (Neil Sedaka Song)?
Sentence (from "Neil Sedaka"): Since his music career began in 1957 as a short-lived founding member of the Tokens, he has sold millions of records as an artist and has written or co-written over 500 songs for himself and others, collaborating mostly with lyricists Howard Greenfield and Phil Cody.
Relevant evidence: No