Zach Sobiech is 17 years old and diagnosed with osteosarcoma, a rare form of bone cancer that takes the lives of a large percent of its childhood victims. Given only months to live, Zach turned to music to say goodbye. He wrote this song and ton of celebs help him out. Some of the celebrities include Sarah Silverman, Ashley Tisdale, Colbie Caillat, Jason Mraz, Sara Bareilles, and many more. Check out the original video Here, or donate to Osteosarcoma Fund Here.