The couple that plays (music) together stays together!
The pair performed a surprise duet to Go Ahead And Break My Heart — which made the audience go crazy — and Stefani even did a little Hollaback Girl for the unsuspecting fans in between Blake's country numbers!!
But wait — there's even more Periscope video (below)!!
Fans took their own shots of the pair performing, too (below):
#gwenstafani you rocked at #blakeshelton !!!A video posted by Amy Twombly (@oands1023) on Sep 16, 2016 at 8:59pm PDT
Such a fun surprise for those fans!!!
[Image via ABC.]