A man dressed as a leprechaun entertains the crowd on a water propelled Flyboard while workers dye the Chicago River green to kick off the city's St. Patrick's day celebration on March 16, 2013, in Chicago. The dying of the river has been a tradition in the city for 43 years. (Photo by Scott Olson/Getty Images)

A man dressed as a leprechaun entertains the crowd on a water propelled Flyboard while workers dye the Chicago River green to kick off the city's St. Patrick's day celebration on March 16, 2013, in Chicago. The dying of the river has been a tradition in the city for 43 years. (Photo by Scott Olson/Getty Images)