:salam2:
Sister,
I would first point out that your husband's parents are his parents... they have a right on him. If what they want is
NOT Haram then I suspect he would have no Islamically legal grounds to refuse to his parents.
I don't know what actually they want to do during the wedding ceremony, not every Pakistani wedding has singing and dancing in it. So my suggestion would be to ask him what kinds of activities they want to do during the wedding. Make a list of it and then ask a Sheikh or your Imam or a scholor about each item. If any of the item is haram then you have a right, rather a duty to refuse it. Those items that are not haram, negotiate on them. This would be best solution.
Don't have this western ego kind of thing that this is my wedding and I can veto anything... as you said: "after all it is MY wedding, not his mother's or father's."
We not just marry to an individual but we also join his/her family. According to several hadiths a man should care for his mother more than his wife.
So, what I am saying is that first get the list and then get the opinion of a sheikh, then smartly negotiate and agree to a balance which work for all parties.
Note: They may break the promise at the wedding and do something you didn't agree with. IF that happens, then don't make a big fuss about it. Allah knows what is in your heart, so you won't be held responsible.
Please accept my Congratulations on getting
married
. May Allah make your marriage permanant, loving and a blessed one. Ameen.