Not how I personally interpreted the question, but that's a fair point.
Even if that's the case though, I don't see why anyone would have to keep it a secret. To quote a favourite 'girl song' of mine..."Why'd you have to go and make things so complicated?"
I think OP is just asking the age-old question of "what is you guilty pleasure pop-song". Just very poorly worded. I'm not gonna hold that against 'em.