Okay!!! Finally FOUND it!
It's the Scissor Sisters - I don't Feel Like Dancing.
Thanks everyone for your help!!!
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I heard this in Studio 54 in Vegas the other day.
I dont know if its a newer or older song, whoever sings it has a high pitched voice and it sounds like it might be disco...i know the chorus goes ' keep dancing, dancing dancing' its a very upbeat song. Please help its driving me crazy.