"As long as we've entered the realm of novelty songs again, how about Benny Bell's "Shaving Cream?"
That was first a hit back in 1946, when it was first recorded (and made the charts without any airplay at all--can you imagine ANY radio station playing it back then?). It came to most folks' attention when Dr. Demento dug it out, made it a feature on his show. Then back around the spring of '75 Mark Driscoll, the PD of WBBF in Rochester (which carried Dr. Demento on Sunday nights IIRC) noticed it was getting requests, and IIRC, he put it in the rotation, or at least played it in afternoon drive and allowed other jocks including night guy Cary Pall to play it. Don't know if that was the only catalyst for the record's revival but it didn't hurt.
Driscoll did so much crazy stuff on that station back in the mid-70s that it helped stop and maybe even reverse BBF's slide for at least a while, at at time when both WAXC and the emerging competition on FM had really been giving them problems.