Normal
If you are in an OV on Upper Deck (cat.6C), there are only two possibilities of an upgrade; to cat. 6D (one deck up to Empress Deck), or to a cat. 12 on Verandah Deck. Since there are only 10 cat. 12 cabins on the ship, your chances of getting upgraded to a cat. 12 are at best,slim and none. Getting an upgrade to a 6D has no real significance IMHO, since all cat. 6 cabins on the Celebration are virtually identical, just on different decks.
