Zach Sobiech was a 18 year old diagnosed with Osteosarcoma, a rare form of bone cancer. At the age of 14, found out he had the rare form of terminal cancer. So he became a rock star, and millions of people got to see his music before he passed away on May 20, 2013. This is his beautiful story. With only months to live, Zach turned to music to say goodbye.