I don't really recall Your Hit Parade as a radio program, but after it made the jump to TV in 1950, it eventually became a regular part of my family's viewing schedule. The show, which was also sometimes called the Lucky Strike Hit Parade (since the American Tobacco Company paid the bills), had a pretty simple format. A stable of singers and musicians would perform the nation's top songs each week, always ending with the number one hit, which would be presented with a lot of fanfare and hoopla. Since there would be some repeats each week among the top songs, the staff of the show had to come up with different scenery and costumes to keep it interesting.
Every week we'd gather around to watch it on our TV, which couldn't have had more than a 14 or 15 inch screen -- black and white, of course. (The only color set I ever saw in those days was when an uncle of mine got a "color converter" by mail-order. It turned out to be a multi-colored sheet of transparent plastic that you stuck onto your TV screen, which allowed you to watch an actor walk across the screen and change from yellow to green to red to, well, you get the idea. It made you nauseous to watch it.)
Part of the fun of watching the show was guessing what the top song would be each week, and I remember bouncing around on the carpet in front of the TV, making my guesses while ignoring my Mom's entreaties to move back from the TV because it would "strain your eyes". Of course, it was usually pretty easy to guess the number one song, because by the time you got to that point in the show you had a pretty good idea what the top song was just by a process of elimination. However, since the show used a mysterious combination of stats from "record sales, jukebox plays, radio requests, and sales of sheet music" (?), some surprises were inevitable. But there was never a hint of manipulation and we never questioned any of their choices. In fact, if the show said a song was number one, then by golly, that was it as far as we were concerned.