Because you like "The Muppet Christmas Carol"
The Great Gonzo as Charles Dickens / Robert Marley / Dr. Bunsen Honeydew / Betina Cratchit / Rat / Zoot (voice)
Kermit the Frog as Bob Cratchit / Rizzo the Rat / Beaker / Bean Bunny / Belinda Cratchit / Beetle / Lips / Pig Gentleman (voice)
Tiny Tim Cratchit / Jacob Marley / Ghost of Christmas Present / Lew Zealand / Ma Bear / Mouse / Mr. Applegate / Penguin / Pig Gentleman / Pops / Rat (voice)
Miss Piggy as Emily Cratchit / Fozzie Bear as Fozziewig / Sam the Eagle as Headmaster of Junior High Graduates / Animal / George the Janitor / Horse and Carriage Driver / Vegetable Salesman (voice)
Ghost of Christmas Yet to Come (performer) / Ghost of Christmas Past (performer) / Turkey / Additional Muppets (uncredited) (voice)
Daughter Mouse / Ghost of Christmas Past (performer) / Additional Muppet Performer (voice)