Do the Alphabet/Gravity Falls

Cast

 * Big Bird as Dipper
 * Betty Lou as Mabel
 * Cookie Monster as Grunkle Stan
 * Alfred Duck as Soos
 * Zoe as Wendy
 * Fat Blue J Friend as Old Man McGucket
 * Elmo as Robbie
 * Goldilocks as Candy
 * Sherry Netherland as Grenda
 * Ernie as Grunkle Ford
 * Baby Bear as Mermando
 * and more