https://www.youtube.com/watch?v=gYkACVDFmeg
I don't entirely get disco, it seems. It's certainly not that I'm against it: there will be four disco songs on the countdown. That said, all of them were massive hits and obvious choices. (I also considered "In the Navy", although it wouldn't have been the radio version: it would have been the one from the Muppet Show sung on a coastal village raid by Viking pigs.) Chuck Eddy has argued that disco succeeded in achieving progressive rock's goals -- of bringing together unlike forms of music from across the world -- far beyond prog's own powers, and I find it plausible that he might be right. You'd have to link me favorite examples in the Comments, though, because most of the disco songs I've heard *other* than those mega-hits strike me as bland.
"I Will Survive", though, works, and it's definitely eclectic.