Astaire was the dance master of his time, but in the 80's and 90's, Michael Jackson, love him or hate him was the king of dance moves. His anti-gravity lean was amazing to see, he patented the shoe that made him able to do it. Also the Moon Walk, was also made famous by Jackson, but he was not the one that invented it.
Michael Jackson Dancing
Anti-Gravity Lean:

In the video, Michael Jackson performs an anti-gravity lean without the use of cables, a seemingly impossible feat. To accomplish this maneuver for stage performances, Jackson patented a hitching mechanism which was built into the floor of the stage and the performer's shoes. The system consists of pegs that rise from the stage at the appropriate moment, and special shoes with ankle supports and cutouts in the heels which can slide over the pegs and be temporarily attached to the stage. These allow a performer to lean without needing to keep his center of mass directly over his feet. However, the feat still required very good core strength.
Anti-Gravity Lean in action, and the mechanism revealed:
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