Tony Bennett and Kermit the Frog: Bein' Green
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From Al.com:
This felt-covered creation of Jim Henson coined the phrase, "It's Not Easy Being Green," in a song he first performed on "Sesame Street." You can watch the lovable frog sing his signature song on YouTube. In it, Kermit laments about how hard it is to be different, only to have an epiphany that being different can be a good thing, too.