don't look into the camera?
When Paul Anka was singing, he kept looking up, never looking directly into the camera. I thought it was sort of odd. Then came Roy Hamilton's turn, he too never looked directly into the camera (although in a long shot, he did manage a peek into the camera.
It must have been a little too much directing. Although Danny and the Juniors and the "Short Shorts" singers did look directly into the cameras, so that kills my theory, I guess.
The producers could have come up with a few more dollars and sprung for a few more dancers during the Wink Martindale dance show segment, you think?