In this publicity image released by Comedy Central, TV personalities, Jimmy Fallon, left, of "Late Night with Jimmy Fallon," and Stephen Colbert of "The Colbert Report," are shown during the taping of Colbert's show, Thursday, March 3, 2011, in New York.  Both men have been the inspiration for Ben & Jerry's  ice cream flavors, "Americone Dream" for Colbert and "Late Night Snack" for Fallon. (AP Photo/Comedy Central)

In this publicity image released by Comedy Central, TV personalities, Jimmy Fallon, left, of "Late Night with Jimmy Fallon," and Stephen Colbert of "The Colbert Report," are shown during the taping of Colbert's show, Thursday, March 3, 2011, in New York. Both men have been the inspiration for Ben & Jerry's ice cream flavors, "Americone Dream" for Colbert and "Late Night Snack" for Fallon. (AP Photo/Comedy Central)