King of Pop.

I love him so much (even though most of his most recent number ones are among his most lackluster).
Quote:
Originally posted by Eternium
"...Baby One More Time" is bigger than any single from Katy Perry 
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In terms of cultural dominance, ubiquity, long-term appeal, acclaim, and pretty much every other metric but chart performance, I agree.
Katy has had a few singles that have done better than Baby One More Time on the Hot 100; Dark Horse may very well make the all-time chart when it's next updated.