Céline Dion knows how to belt a love song, so what better place to propose to your girlfriend than at Dion's Las Vegas residency show?

SEE ALSO: Newborn baby becomes ideal wingman in father's surprise proposal

Austin McMillan and her boyfriend, Nick Janevsky, attended a pre-show meet-and-greet on Friday to meet McMillan's favorite performer. When the couple got in front of the singer, Janevsky got down on one knee, pulled out a ring, and proposed.

McMillan said in an Instagram post that the events of that evening came as a surprise -- but from the pictures, no one was more surprised than Dion. Just check out the look on her face.

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"Céline was shocked and I was, too. She was super sweet and wished us a long and happy marriage like she had with her husband," McMillian said in an ETinterview. "Then [she] invited herself to the wedding!"

We hope Dion can take a break from her Vegas show to attend the couple's nuptials. Maybe she'll even sing the couple's first dance song.

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