A compilation of classic "Sesame Street" clips that feature such iconic characters as Grover, Abby Cadabby, Elmo, Oscar, the Cookie Monster and best pals Bert and Ernie. Also: Elvis Costello duets with Elmo on "A Monster Ate My Red 2"; Julianne Moore joins the Count for "Far From 7"; James Blunt and Telly Monster collaborate on "My Triangle"; and Gloria Estefan and Rosita join forces on "Sing."