Chris Brown mocks Grammy winner after loss

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Chris Brown proved he was nothing but a sore loser after his loss at the Grammys on Sunday night.

The artist was nominated for Best R&B Album for “Breezy (Deluxe)” alongside Mary J. Blige, Robert Glasper, Lucky Daye and PJ Morton.

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When Glasper was announced as the winner of his 'Black Radio III' album, CB took to Instagram to ridicule the pianist, songwriter and record producer, who is now a five-time Grammy winner.< /p>

Chris posted a Google screenshot of Glasper and wrote: "BRO WHO THE F–K IS THIS?"

CB's vitriol didn't stop there...he popped the question again in another IG post..."YALL PLAYING  WHO DA F–K is THIS?"

And, CB did it a third time..."WHO THE F*CK IS ROBERT GLASPER".

CB in...