Need a little pick-me-up that will leave you smiling from ear-to-ear? This video of a Japanese kindergarten class singing "Dayman" from It's Always Sunny in Philadelphia should do the trick. If that doesn't work, well, sorry, friend — I have no idea how to help you.

For reference, here's the original.

Never in my life have I been more proud of the work of Americans abroad.

[Mashable]