This is the most wonderful thing we've heard all week.
[Image via Dennis Van Tine/Future Image/WENN.]
With a dual performance of Treat You Better and Mercy, the singer showed off his abilities with both the guitar and the piano.
And the young girls singing along at the Microsoft Theater could not get enough!
We guess he knows how to play the audience too…
Ch-ch-check out the multi-talented crooner's best chops (above)!