What happens when two of country music's biggest stars get together?
The following video, that's what.
At a tour stop in Nashville last night, Taylor Swift teased the audience about a special guest performer ("You must have known I wasn't going to show up here without a surprise...") and then brought out Luke Bryan for a duet of "I Don't Want This Night to End."
Watch the artist have a blast on the track now:
An unexpected duet is a Swift concert specialty, of course.