"Simple Song #3" is the lead single from a 2015 Italian comedy film set where? 
Simple Song Number 3: "Simple Song#3" or "Simple Song Number 3" is an original song sung by South Korean singer Sumi Jo. Youth (2015 film):  It is the director's second English language film, and stars Michael Caine and Harvey Keitel as best friends who reflect on their lives while holidaying in the Swiss Alps.
Swiss Alps