B.C.
How about you explain to her the others are being done as late Xmas and birthday and if she wants her room done for HER birthday she has a long time to plan it (and since the room will be her gift - if that's what she really wants) then she'll have no party with friends. Explain it to Dad at the same time. She has the luxury of choice and time to plan. (On top of that, since she has the time, if she wants something for the room that is over budget, she can do odd jobs to earn the money for it.) She doesn't get both.
And her Dad should make a point of spending some quality time with her (father/daughter dinner out, walk on the beach, ride bikes / go skating together, etc) and not just give her stuff to make up for not being there.