Reba McEntire's son Shelby Blackstock might be all grown ... but you can hear her and her boyfriend Rex Linn singing "Happy Birthday" as Blackstock blows out the candle on his birthday dessert.

I love you, Shelby, with all my heart mind ... My family's healthy. So I'm happy." Lily Collins Celebrates 'First Birthday as a Mama' as She Reflects on 'Magical Year' — 'I Truly Couldn't ...