The unofficial official song of Groundhog Day. In 1987 David Letterman coaxed Sonny and Cher to perform their biggest hit one more time. The performance starts off awkward but by the end, they seem to be back in 1965. Although they forget lyrics and muck it up a bit, by the end everyone is wiping tears away, including Sonny. 11 years later Sonny would be gone, tragically killed in a skiing accident. Here is a very emotional performance of I Got You Babe.