Childish Gambino's "This Is America" makes history by winning song of the year

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(CBS) -- Childish Gambino reportedly declined an invitation to perform at the Grammys, and he also wasn't in the house tonight to pick up his award.

His "This Is America" took home the Grammy for song of the year, beating out "Shallow," "The Middle" and other huge hits. But presenters John Mayer and Alicia Keys had to accept for the absent rapper.

The song caused a stir last May when Gambino released its ambitious video, which was full of racial symbolism and violent imagery.

The win made it the first rap song to ever take home the prestigious award.

Although Gambino didn't show, we did learn that Mayer and Keys split a Grammy years ago after his "Daughters" beat her out for the award. Like, Mayer literally split the award in half and wrote "If I Ain't Got You" on it for her.

That's love.

The song of the year award goes to the song's writers, unlike record of the year, which goes to the artist.