M.C.
I agree with Denise D that until they are old enough to comprehend what a birthday party is about, the party is really more for the adults and not the child. 2 year olds can be very unpredictable. Have a simple home party with just cake, presents, and close family. Don't overwhelm her with strange people and strange things.
My first son is 23. I had a birthday party for him every year until he turned 12. Until he turned 3 the party was just a waste - more for us then him. With my 2nd child I didn't have any parties for him until he turned 3. He enjoyed that one and we did it at home too. They both remember their 4th birthday party because we had a live entertainer come to our home and perform but that's the earliest party they both can remember.