This simple video shows the bond between 2 sisters. They are called Maisy and Lennon. The original version of the song they are singing is by Edward Sharpe And The Magnetic Zeros and is called “That’s What’s Up”.
The best bit has to be when the younger sister Maisy goes in for her big solo starting at 0:59. Just look at the pride radiating from her older sisters eyes as she watches on at Maisy’s talent.