Travis Kelce proved yet again to be a genius on the microphone -- belting out a rendition of "Fight For Your Right" in a karaoke sesh with Jimmy Fallon on Thursday ... and it was, as it always is, EPIC.
The Super Bowl champ was Fallon's guest on "The Tonight Show" -- and after the two talked about the Big Game, Patrick Mahomes, the Chiefs, the Kelce family and the post-win celebration ... Jimmy asked if the star tight end would hop on a mic with him.
Never one to turn down the spotlight, Kelce obliged .