Whichever has sold the most records. That's what pop music is all about. Once the answer is found, no further debate is required.
However, finding a definitive answer is problematic due to RIAA certification rules.
Bill Haley's "Rock Around the Clock" is the unofficial winner having reported selling 25 million copies since 1955, but it does not qualify under current RIAA certification rules.
The present official RIAA winner is Elton John's "Candle in the Wind" with 11+ million sales.
However, finding a definitive answer is problematic due to RIAA certification rules.
Bill Haley's "Rock Around the Clock" is the unofficial winner having reported selling 25 million copies since 1955, but it does not qualify under current RIAA certification rules.
The present official RIAA winner is Elton John's "Candle in the Wind" with 11+ million sales.