Sesame Street Season 45 Episode 23 Upside-Down Nursery Rhymes Episode Title: Upside-Down Nursery Rhymes Episode Description: Mother Goose has come to Sesame Street, and she's brought some along some awesome friends - including Grammy and Emmy award-winner Tina Fey! Big Bird helps Mother Goose write new rhymes for Little Miss Muffet and Little Jack Horner. She is so grateful that she then writes another one about him.