Check out this test to see if you can read people's faces correctly by distinguishing between a genuine smile and a fake smile:
Spot the Fake Smile
I assumed I would do pretty poorly on the test, but I got 17 out of 20 faces correct. Anyhow, here's a video montage of Pearl Jam playing the song "Smile" live (Touring Band 2000):
Happy Super TWOsday.