Elmo is joined by families and some of his celebrity friends including Bruno Mars, David Hyde Pierce, Nicole Kidman, Amy Ryan, Wendy Williams, Jay Sean, Naomi Watts and Liev Schreiber as he sings a song about the importance of brushing your teeth as part of Sesame Street's newest oral health initiative Healthy Teeth, Healthy Me. Learn more at: www.sesamestreet.org/teeth For more fun games and videos for your preschooler in a safe, child-friendly environment, visit us at http://www.sesamestreet.org Sesame Street is a production of Sesame Workshop, a nonprofit educational organization which also produces Pinky Dinky Doo, The Electric Company, and other programs for children around the world.