Security tag off of a pair of jeans?

I recently came back form the states (i live in Canada) with a bunch of clothes that i bought. I just noticed that on one of the pair of jeans still has the plastic security tage that you cant take off by yourself. obviously i cant go back to the states anytime soon, so what do I do? Can i take it to any store, and will they take it off? what stores will allow you to do that?
thanks!