What is your favorite 1 hit wonder from the 70's?

If we can go back to 1968, "Classical Gas" by Mason Williams should be mentioned, if only for the mind-boggling, finger style guitar cover version from Tommy Emmanuel (available on YouTube).

Surprised Linda Lewis NEVER had a US Top 40 hit. Several songs off her LP Lark(1972)could have hit the Billboard Top 40. Thought I would mention this since her music/voice deserves more acknowledgment.

Cerrone "supernature"

At of good ones mentioned here, although some of the artists were far from one hit wonders. Some bad ones too. (Toni Basil?)
I will add "Into the Night" by Benny Mardones.

I agree, "Afternoon Delight" would be right up there with "Feelings" by Morris Alpert. It has that melancholy feel found throughout Brazilian music that I didn't have a clue about until I married a Brazilian woman and really discovered after the many visits over the years. Alpert was a Brazilian who never made it in Brazil, the irony is how Brazilians really have an affinity for popular American music but NOT Alpert. It isn't the words of "Feelings" but the music, decidedly NOT American pop music but something so different than what I had heard up to that time.