Singing is great, that’s a given these days. But what is getting more and more credence is that singing with other people is more than doubly the effective. Here’s a really good article from the BBC about the myriad of ways singing helps, and how singing with others is SO much better than doing it on your own!
https://www.bbc.com/future/article/20251128-how-singing-can-improve-your-health