Zachary David Sobiech (May 3, 1995 - May 20, 2013) was an American pop singer and member of the pop group A Firm Handshake (with Sammy Brown and Reed Redmond) who gained extensive media attention with the 2013 single "Clouds".

At age 14, Sobiech was diagnosed with osteosarcoma. In May 2012 his doctors informed him that he had up to a year to live. Stating that "I'm not good at writing letters. So I figured instead, I could just write songs for people, and they might be around longer. It's more powerful than writing a letter because a song can get stuck in your head. You find yourself humming it during the day." In response, Sobiech recorded the song "Clouds" and released it as a YouTube video which then went viral. Other artists subsequently began releasing tribute versions of the video, the most notable of which was released on Rainn Wilson's YouTube channel SoulPancake. SoulPancake also released a documentary about Sobiech entitled "My Last Days".

Zach died on May 20, 2013 of complications from osteosarcoma at age 18.

Philanthropy 

Sobiech's family started the Zach Sobiech Osteosaroma Fund at Children's Cancer Research Fund.