Children need a bit of everything in their lives and to learn to enjoy very different people for very different reasons.
Two of my GC, who live locally, have exactly that scenario: one lot of GPs are party animals, very outgoing, quite rumbustious and when they go there they leap about and run and jump. When they come to us they look at books, look though our astronomical telescope, play music on the piano, go for nature walks, bake cakes - and they love that too.
And they see how we get on well with the other set of GPs and will indeed be sharing Christmas with them - and that is a valuable lesson for them, to see that very different people can get on well together.
The party (which does not sound like my idea of a children's party!) will happen; and then it will be your turn to offer her something very different and infinitely more precious: your undivided attention in a quiet environment with lots of cuddles and playing with whatever lovely toy that you will have chosen for her. Just enjoy!