Happiness is viral

I just read about a study by researchers from the University of California and Harvard that found that the levels of happiness of people you may not even know can still rub off on you and can even reach friends of your friends so it's like a chain reaction of happiness! It seems that just a laugh and/or a smile can make a huge difference. I suppose that must seem obvious but I just think it's really nice that the good feelings that laughing and smiling bring can spread really far. So,  to spread the happy, here's a song that makes me smile. I send this song to you with a wish that you have many really happy days in your life.