In episode 209 of “The Muppet Show”, Kermit says that he’s gotten a lot of letters asking if he can tap dance.
In response he sings and dances to “Happy Feet”. With some irony, the audience never sees his feet during the number…there are multiple Kermits are seen on the screen at the same time, but ONLY from the waist up.
This is in Season 2, an episode with guest star Madeline Kahn (July 1977)
Can the frog tap dance? The answer is: Hit it!
Happy feet, I’ve got those happy feet
Give them a low down beat
And they begin dancing
I’ve got those ten little tapping toes
And when they hear a tune
I can’t control my dancing heels
To save my soulWeary blues can’t get into my shoes
Because my shoes refuse to ever grow weary
I keep cheerful on an earful of music sweet
‘Cause I’ve got happ happ happy feetWeary blues can’t get in our shows
Because our shoes refuse to ever grow weary
We keep cheerful on an earful of music sweet
‘Cause we’ve got happ happ happy
‘Cause we’ve got happ happ happy feet