Taylor Swift & Travis Kelce's "Love Story" wasn't the main focus of a recent event ... 'cause a different couple was getting married, and they just looked on!
The A-list couple was spotted in Tennessee at a backyard wedding ... definitely drawing eyes off the bride and groom, though we're sure they didn't mind.
Taylor's dressed in an ankle-length blue dress while Travis is decked out in slacks and a button-down shirt .