The Grammys have had surprising winners, acceptance-speech crashes, and impromptu performances that have become iconic moments in music history.

Busta Rhymes, Laufey, Maggie Rogers, Teddy Swims, and Charlie Puth also performed Carey's songs for her at the Person of the Year event ...

The stars were singing her tunes all night as MusiCares honored Mariah Carey as its Person of the Year.