These are the tracks that had one thinking when first hearing - WTF is this crap? But then the radio keeps playing it and the groove and repeatable chorus just gets into your head and before you know it, you are dancing at the club when it's played. Come on, a song called "chumbawamba"? Immediately you think that is just rubbish but then a week later you are requesting it and gittin' down.
It's just the way music flows when you hear it on popular stations and see celebrities dancing to it. It's communicable effect. Hate it first but wanna be part of the fad.