I’ve been an oldies nut for decades and I’ve known it just as long. It is played a lot.
I am also an Oldies nut, as anyone who reads my posts will find out. "Mr. Lee" has been a fixture on the Oldies playlists ever since I was a teenager in the sixties.
Incidentally, I saw the Bobbettes perform live around 2000. I don't know if the group included any of the original members, but they certainly sounded authentic.