In their own video reconstructing Pharrell Williams’ hit song, “Happy,” seniors at a New Zealand retirement home have portrayed the essence of the song by dancing their way through the halls and lawns of their retirement home.

Sixty residents and staff members at Diana Isaac Retirement Village in Christchurch, New Zealand, took part in the video as a joint project. The residents and staff “combined all their considerable talents to come up with this tribute. ... The residents wanted to show their children and grandchildren just what they’re made of!” the retirement home writes on the YouTube page.

Studies have shown that there are a variety of factors that go into happiness levels and quality of life for retirement home residents, including higher numbers of staff members and residents socializing with their staff and caretakers.

But research has also shown that old people are the happiest age group. Happiness levels tend to peak in the 20s, then decrease gradually throughout the 30s, reaching a low in the mid-40s. However, once you get past age 50, you’re likely to see your happiness levels rise substantially, leaving you the most content well past your 60s and 70s. This gradual rise in happiness the older you get may be due to the fact that, as an author of one study, Andrew Oswald, says,“individuals learn to adapt to their strengths and weaknesses, and in mid-life quell their infeasible aspirations.”

Instead of stress and worrying about future ambitions, job responsibilities, and forming identity, old people are more likely to be content with simply living in the present and being… happy, naturally.