Matthew McConaughey is getting some love from his kids! On Wednesday, the actor took to Instagram to share a video that showed how his and Camila Alves' children, Levi, 12, Vida, 10, and Livingston, 7, celebrated his 51st birthday.In the sweet clip, which appeared to be a throwback based on the kids' ages, the tots, acting excited and silly, celebrate their dad by singing «Happy Birthday» to him.