Grover and his all-star friends sing about the Monster in the mirror, including appearances by Robin Williams, Whoopi Goldberg, Jeff Goldblum, The Simpsons, Robert MacNeil, Malcolm-Jamal War... Read allGrover and his all-star friends sing about the Monster in the mirror, including appearances by Robin Williams, Whoopi Goldberg, Jeff Goldblum, The Simpsons, Robert MacNeil, Malcolm-Jamal Warner, and Ray Charles. Join your favorite celebrities and sing-along to the song that's got... Read allGrover and his all-star friends sing about the Monster in the mirror, including appearances by Robin Williams, Whoopi Goldberg, Jeff Goldblum, The Simpsons, Robert MacNeil, Malcolm-Jamal Warner, and Ray Charles. Join your favorite celebrities and sing-along to the song that's got everybody going "Wubba!"