You know it was bound to happen and if you were lucky enough to win tickets from 929 The Bull for the Blake Shelton concert in Tacoma on Saturday, you got an extra surprise!

Gwen Stefani crashed the show and we've got the video of the duet.

Blake and Gwen sang their duet "Go Ahead And Break My Heart" ... if you missed it, here's the video.

I love when artists that duet show up at each other's show and perform.

I think my most favorite duet that I saw live was in Nashville in 2006 when Bon Jovi and Richie Sambora performed with Jennifer Nettles.

If you saw the show live this weekend, what a memory you have.