This weekend it’s a Vegas wedding and Martina McBride and Train's Pat Monahan are the wedding singers!

It all revolves around Sunday's 47th Annual ACM Awards. There will be 24 musical performances on the telecast, including Carrie Underwood, Blake Shelton and Lady Antebellum.

And about that wedding, it's happening onstage during the show, with McBride and Monahan singing their duet (and Martina's next single) "Marry Me" for a New Jersey couple hand-picked by Martina.

You can catch the show, and the wedding, this Sunday night on CBS.