Seniors Get Happy with Pharrell Williams’ Smash [VIDEO]

A new viral video featuring Pharrell Williams' monster hit proves you're never too old to be Happy!Check out these seniors from a California senior living facility dancing and singing along to Pharrell's number one smash. Everybodys seems so... Happy. Even the staff gets involved.

Pharrell seemed Happy and even responded to the video in a tweet.

Check out the video below...