In DC's Legends of Tomorrow season 4, episode 8, "Legends of To-Meow-Meow," the characters are transformed into Muppet-style puppets for a segment featuring a song about asking for help. The scene arises from a fractured timeline where Mick Rory becomes a fairy godmother.
You can watch the full scene and song on YouTube or find detailed descriptions on the Arrowverse Wiki . Legends.Of.Tomorrow.4x08.Puppets.Of.Tomorrow.IT...