NFL's Rashad Jennings -- Busts Out Drake's 'Hotline Bling' ... Piano Man Style

This is pretty great ...

NY Giants starting running back Rashad Jennings showing he's got a little Elton John in him ... doing a piano rendition of Drakes' "Hotline Bling" in Hawaii ... and absolutely killing it.

Jennings has been vacationing on the islands ... and while checking out the local scene, he made it a point to flex his musical muscle for anyone who was in earshot.

There's been jam sessions that included guitar playing and singing ... but it was when he sat down behind the piano and got all 6 God with it that the G-Man's talent really shined.

Watch ... and enjoy.