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Lupita Nyong'o, John Mayer, Zac Efron, and Christina Hendricks on 'Sesame Street'
In the four decades that Sesame Street has been on air, dozens of stars from Julie Andrews to Johnny Cash to The Backstreet Boys have picked up the directions to the famed block. Ahead, classic visits to Sesame Street from some of the biggest celebs.
Image Credit: Sesame Street
August 6 2012 — 12:00 AM EDT