Charlie Day Gives Commencement Speech At His Alma Mater (VIDEO)

It's graduation time again, and that means celebrities get to go back to school to make commencement speeches, some more entertaining than others. Charlie Day, of "It's Always Sunny in Philadelphia" and "Horrible Bosses" fame, falls into the "more entertaining" category, as evidence by his speech Sunday at his alma mater, Merrimack College.