
The data published in the Grammy Awards website confirms Michael Jackson and Santana won the most number of awards in one night in 1984 and 2000.
On 28 February 1984, Michale Jackson had become the first artist to win eight Grammys in one night during the 26th Annual Grammy Awards. Santana a rock band won eight awards and tied Jackson's record in 42nd Annual Grammy Awards held on 23 February 2000.
Therefore, Michale Jackson and Santana have the record of winning the most number of Grammys in one night, not Billie Eilish.
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