"Under the Boardwalk" was a song covered by the Muppets on their album Muppet Beach Party. It was originally recorded by The Drifters.

Clifford happens to discover a group of surf rats under the boardwalk, singing and collecting food that's fallen through the cracks. Clifford tries to shoo them away so he can bring a girl down there, but instead uses the rats for back-up as he sings.

Clifford would later sing another one of The Drifters' songs, "Up on the Roof," on Muppets Tonight.