If a player danced while wearing only this item, they would make a few poses, take the necklace off, have it roll across their flippers, and then put it back on.
While the special dance was performed, the color of the beak and feet of the penguin turned into a darker tone of orange. The same happened with the EPF Comm Headset, where its special dance made the beak and feet darker when dancing with the Bling Bling Necklace.