Clearly you have forgotten The Flying Lizards cover of “Money”.
You'd likely need to narrow the catagory down by decade, and maybe even genre. Otherwise, we could be here all night.
Personally, my vote would go to "MMM MMMM MMM MMM" by the Crash Test Dummies. I couldn't escape that song when I was in college. It was everywhere. We could use it to torture Gitmo prisoners, except that extended waterboarding sessions would be more humane.
I dunno about any Pop music after 2000 or so. It all started sounding the same, or the same as what I listened to when I was younger.