If you were at Thursday night's Bruno Mars show, you got an unexpected treat: a guest appearance from Ed Sheeran.

On Aug. 8, Bruno was on the latest stop of his Moonshine Jungle tour at St. Louis' Scottrade Center when -- to the delight of the crowd -- Ed joined him on stage for joint renditions of 'The A-Team' and 'Nothing On You.' And it went so well that Mars jokingly accused the talented ginger of trying to steal his thunder (but judging by local reviews of the show, he needn't have worried).

Meanwhile, when Ed isn't busy making surprise appearances or touring with pal Taylor Swift, he's thinking about taking a page from her playbook (albeit in reverse) and going country.

"Country music is some of the best-written music in the world, so yeah, one day, I would keep my mind open to doing a country record," he recently said. "Hunter Hayes has some sick music ... There's so much good country music out there."

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