I might be a little late with this but today is the United Nations second International Day of Happiness. So let me help you celebrate with a few Happy and Happiness songs. Enjoy them and feel free to contribute some of your own.
https://www.youtube.com/watch?v=t7YGTyIA6S4
https://www.youtube.com/watch?v=Ls8t1AcXN_o
https://www.youtube.com/watch?v=iCQ0vDAbF7s
https://www.youtube.com/watch?v=cU5stPus7PA
With Just A Hint Of Mayhem 