Martina McBride and Train's Pat Monahan Serenade ACM Wedding

A televised-wedding gimmick brainstormed by Martina McBride went smoothly on Sunday night as the country superstar serenaded Christina Davidson and Frank Tucci at The Academy of Country Music Awards.

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McBride's duet partner, Train frontman Pat Monahan, joined her onstage to perform "Marry Me" while an officiant married the New Jersey couple. The pair's vows were largely obscured by the music, but McBride and Monahan toned things down in time for their first kiss as husband and wife.

McBride, who came up with the concept for the on-air nuptials, hand-selected Davidson and Tucci from a group of candidates after being moved by the story of how they got together (on the ACM-wedding circuit as in reality TV, all contestants require a good backstory).

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The newlyweds first connected at a support group Davidson launched for young widows and widowers following the death of her husband, Paul, in a drowning accident in 2009. Tucci lost his wife, Danielle, to thyroid cancer that same year and began attending the support group. They quickly formed a bond and Tucci proposed along with their three children sporting T-shirts that read, "Will you marry me?"

McBride adapted Train's 2010 single, "Marry Me," from their fifth studio Album, Save Me, San Francisco. The song has become a favorite for couples to play while reciting their marriage vows.

The 47th Annual Academy of Country Music Awards, presented at the MGM Grand in Las Vegas, featured repeated wins by Taylor Swift, Miranda Lambert, and Lady Antebellum in the Entertainer, Female Vocalist, and Vocal Group of the Year categories.