Taylor Swift closed out her Red tour on a high note in Nashville Saturday night (Sept 21). The superstar invited rising sensation Hunter Hayes onstage to perform his hit, 'I Want Crazy.'

"So here we are on the last night of the Red tour, right," she addressed the audience. "This happens to be one of the most beautiful, incredible, loud, insane crowds I've ever seen in my life."

She teased, "What would you say, beautiful, loud, insane crowd, if I told you I have a surprise for you? I think you're gonna be really excited about this one. I could not be happier that he started off as an opening act on the Speak Now tour, and he's now one of the biggest stars in America, closing out the Red tour. Hunter Hayes is here!"

The 22-year old star came out with his guitar for a high-energy rendition of his recent hit, with Swift alternately posing playfully and joining in on the vocals.

The appearance capped off a three-night stand at Nashville's Bridgestone Arena that served to wrap Swift's Red tour. Luke Bryan joined Swift onstage for the first night, while Rascal Flatts came out on the second night.

Swift has no further concerts scheduled until Nov. 29, when she will kick off a string of dates in Australia.