The other day I linked to a post about the best and worst one-hit wonders. Quite a few songs weren't mentioned, mainly (I suspect) because they were so old. Here are a few of them. If you're as old as I am, you can probably think of a few dozen more.
The Monotones: Book of Love
Silhouettes: Get a Job
Jody Reynolds: Endless Sleep
Tony Bellus: Robbin' the Cradle
Joan Weber: Let Me Go, Lover
Thurston Harris: Little Bitty Pretty One