Zach Sobiech, the singer and songwriter behind viral YouTube hit "Clouds," passed away on Monday this week.
The 18-year-old battled a rare kind of cancer for most of his teen years after being diagnosed with osteosarcoma when he was 14-years-old. As a way to say good-bye to his friends and family, Zach wrote a song called "Clouds" that he uploaded on YouTube in December. The deeply personal video ended up touching the lives of millions of people on the Internet.
