What was the first song from "Thriller" to hit #1?

The record of Michael Jackson against the background of other old vinyl records

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Michael Jackson had already conquered the world as part of the Jackson 5, then again with "Off the Wall," so by 1982 the pressure was on to prove he could keep delivering solo magic. "Thriller" went on to produce seven hit singles and turned Jackson into the undisputed King of Pop. Which song from "Thriller" was the first to top the Hot 100?