"Happy April Fools' Day everybody! I switched places with Jimmy Kimmel!" Fallon said in his opening monologue. "Although, as far as surprises you've seen on ABC this week, this one's a distant second.
Which Jimmy is which?! Jimmy Fallon and Jimmy Kimmel shocked viewers this week with an epic prank, swapping shows for April Fools' Day and leaving the big reveal until the very last second. Kimmel ...