There's a kid, no, a man who was named Zach Sobiech. He died today of cancer, more specifically osteosarcoma. When he was diagnosed and told it was terminal he did the incredible - he chose to live life to the fullest and be a rockstar. The song below is his original piece (one of several) and the video was recorded by a few people that you may recognize and some that your may not recognize. What's important is that it was a collaboration that they all willingly took part in after hearing Zach's story.
He did see this video and it seemed to make him happy. If you have twenty three minutes to spare after reading this post there's a short documentary on Zach that is a great story; you can see it here.