Martina McBride and Pat Monahan are to perform \"Marry Me\" during a live wedding at the Academy of Country Music Awards in Las Vegas, CBS said. Christina Davidson and Frank Tucci, a couple from New Jersey, were selected to exchange vows on the prize presentation. \"To celebrate the message of the song, McBride and Monahan will perform the duet during a very special moment in the show, when a couple will get married live onstage,\" the network said in a news release. The song was written by Monahan and originally released in 2010 on his rock band Train\'s fifth studio album, \"Save Me, San Francisco.\" McBride, a country music star, covered the song on her latest album, \"Eleven.\" The ACM Awards show is to take place Sunday at the MGM Grand Garden Arena.