Travis Kelce Unable to Finish Well-Known Taylor Swift Lyric

Travis Kelce got asked to finish a Taylor Swift lyric this week ahead of the Super Bowl -- and it sounds like he might not have known it off the top ... which is interesting.

The Chiefs tight end was talking to media members Thursday in Vegas, and yes -- he was getting asked about his girlfriend a lot, including a question from one journo who compared him and Tay Tay to the American version of the Royals. Yep, major sucking up, no doubt.

She then asked why he thinks people are so fascinated with them as a couple -- and he said people love the "values" they stand for, etc. Legit answer, and probably true ... but ya know what else they love? Taylor's lyrics, and that's where this exchange got interesting.

The reporter asked Trav to complete a line from a VERY well-known Taylor song, "Karma," and she lobbed up the lyric even a mild Taylor fan could recite.

And yet ... TK appeared to fumble on the play, as he chuckled and asked the reporter to jump to her next question.

The actual lyric in question is, "Karma is the guy on the screen // Coming straight home to me."

The reporter gave him, "Karma is the guy on the" ... and Travis confidently added, "Chiefs" -- a nod to the lyric change Taylor made while he was in the crowd for one of her Argentina shows last year.

It's unclear if he realizes that's not the OG lyric. BTW, he wasn't able to finish the rest of the lyric either.