This is a treat for the fans!
The 22-year-old pop star had teased something like this on Instagram earlier in the week, and then debuted the mashup at the Toyota Center in front of an adoring crowd!
Grande sang along with Bieber’s familiar hit, as well as putting some of her own ideas into the remix! Ch-ch-check out the video from the concert (below):
Pretty awesome!! What’d U think of the mashup??
[Image via Alberto Reyes/WENN.]