Zach Sobiech, a 17 year old who is fighting cancer has encouraged a ton of celebs to participate in this amazing serenade/ celeb shout-out/ farewell video. Honestly, get out the tissues & get ready to be inspired. 

Zach wrote & penned the song "Clouds" as his farewell song, and we can only imagine it is amazing for him to see this video.

Watch the video below & enjoy the life you've got!