Jay-Z sang Beyoncé a birthday serenade at the 'Made in America' festival.

On the occasion of his wife's 36th birthday, the 47-year-old rapper persuaded thousands of visitors to the festival to sing 'Happy Birthday' with him for his children's mother. On a video that shows the musician singing with the audience, you can see the triple mother dancing to the birthday song away from the action. As 'Entertainment Tonight' reports, Beyoncé's mother is said to have later addressed her daughter publicly via her Instagram account. Tina Lawson wrote: "36 years ago, God chose me from all mothers in the world to become yours! Am I not blessed? Not only because you are a super talented, clever business woman and one of the greatest superstars, but because you are the loving, most intuitive, most loyal, most down to earth, funniest, warmest and most grateful person. I am proud to be your mother. Congratulations my darling! I love you with all my heart. "

A very special birthday present was probably her husband's decision to postpone his tour until the end of the year in order to be able to spend more time with the family. Jay-Z recently told 'Rap Radar': "I moved the tour to October so that I can have at least four months with the little ones. This way we can grow together better and I can see them getting bigger. They will be with me anyway coming on tour but I wanted to have a time where I just focus on them and do nothing else. That's why the tour comes so late after the album. "