Everyone/I'm Sad Because I'm Happy (from Oscar's Trashy Songs)

Cast

 * Captain Hook (from Jake and the Never Land Pirates) as Oscar the Grouch
 * Red Jessica (from Jake and the Never Land Pirates) as Grundgetta
 * Swiper (from Dora the Explorer), The Grinch (from The Wubbulous World of Dr. Seuss), Sheldon J. Plankton (from SpongeBob SquarePants), Janja (from The Lion Guard), Diesel (from Thomas and Friends), Vendetta (from Making Fiends), Uncle Deadly (from The Muppets), Cedric the Sorcerer (from Sofia the First), Mr. Burns (from The Simpsons), Dr. Doofenshmirtz (from Phineas and Ferb), Princess Ivy (from Sofia the First), Zach Varmitech (from Wild Kratts), Princess Luna (from My Little Pony: Friendship is Magic), Miss Nettle (from Sofia the First), King Sombra (from My Little Pony: Friendship is Magic), Discord (from My Little Pony: Friendship is Magic), Shere Khan (from The Jungle Book), Sid Phillips (from Toy Story), Nasty Jack (from The New Adventures of Winnie the Pooh), Yosemite Sam (from Looney Tunes), Scar (from The Lion King), Randall Boggs (from Monsters, Inc.), Gloomius Maximus (from Rolie Polie Olie), Screwy (from Rolie Polie Olie), Mr. Rude (from Mr. Men), Mr. Stubborn (from Mr. Men), Pete (from Mickey Mouse Clubhouse), Fuzzy Lumpkins (from The Powerpuff Girls), Diesel 10 (from Thomas and Friends), Mandark (from Dexter's Laboratory), Mojo Jojo (from The Powerpuff Girls), Crunch the Shark (from Beanie Babies), Sly the Fox (from Beanie Babies), Howl the Wolf (from Beanie Babies), Swampy the Alligator (from Beanie Babies), Spinner the Spider (from Beanie Babies), Hissy the Snake (from Beanie Babies), Bushy the Lion (from Beanie Babies), Jafar (from Aladdin), Gaston (from Beauty and the Beast), Robbie Rotten (from LazyTown), Hopper (from Toy Story) and Too-Tall (from The Berenstain Bears) as The Grouch Choir
 * Richard (from Peg + Cat) as Elmo
 * Dongwa Miao (from Sagwa, the Chinese Siamese Cat) as Telly Monster
 * Bonita Flamingo (from The Noddy Shop) as Rosita
 * Beaker (from The Muppets) as Honker
 * Max (from Max and Ruby) as Benny Rabbit
 * Olie Polie (from Rolie Polie Olie) as Grover
 * Bear (from Bear in the Big Blue House) as Cookie Monster
 * Peg (from Peg + Cat) as Zoe
 * Marvin (from Marvin the Tap-Dancing Horse) as Horse
 * as Chickens
 * as Dogs
 * as Sheep
 * Pingu (from Pingu) as Penguin
 * Cat (from Peg + Cat) as Chip