The Voice Pharrell Williams joins Elmo and Cookie Monster on 'Sesame Street' song 06/30/2016 Pharrell Williams adds his name to the list of celebrities who have performed on "Sesame Street" by singing a song with Elmo and Cookie Monster about the magic of books. Read More RELATED NEWS Gwen Stefani joins CNN's New Year's Eve broadcastChristina Aguilera denies she quit 'The Voice' due to Gwen StefaniChristina Aguilera slams 'The Voice' -- "It's not about music" TAGS: The Voice Pharrell Williams Sesame Street
