Hard to believe, but Reba McEntire is 70 years old! Over the weekend, on her birthday, the legend performed in Uncasville, Connecticut and the crowd serenaded her with a rousing rendition of "Happy Birthday." Part of that crowd, unbeknownst to Reba, were several family members, including her son Shelby Blackstock and daughter-in-law Marissa Blackstock. Reba had no clue they were there until she came backstage after the show and saw them in the green room, where they once again sang "Happy Birthday" to an emotional McEntire. Check out a video of the moment below