hey buddy whats up

First why did they understood you were hitting on them? Maybe you were reluctant/shy to ask whats the song was on. I mean maybe your body language gave up that you were hitting on them

Youur body language should not give you up, you ask that kind of question in the same manner as you ask "whats the special meal" at the restaurant. Like its nothing - you heard the song and instantly ask whats on. If its done right you can be under their radar (they won't get that you hit on them or at least they woud doubt)
Now if they got you, 2 ways:
1. if they are being bitchy/sarcastic you can neg them (something like "me hitting on you?" - and your body language says that there is no way you would hit on them - DHV yourself)
2. If they being nice you can admit it in a confident way with a smile. Again you should do that like its nothing for you - you are alpha and you hit on women every day. No hesitation no nervousnes.
2cents
