Boys don't sing

So, I watched this awsome program on BBC, and it was about a school with a choir. There was a boy that sang so beautifull, but his friends said a choir is boring and so he didn't join. One afternoon, they got surprised and shown what the choir did. They joined and did different kind of styles, and here is what the final result was:
https://www.youtube.com/watch?v=HQxHxloG854

I really love the song, and the boy that sings Beautifull girls is the boy with his friends that found the choir boring.