This website is the various cabin layouts showing you the type of cabin and the views show whether window or porthole.
Apologies that web ref appears to freeze try this one
go down to the list of Thomson cruise ships about middle right and click on Celebration and up should come into on cabins/decks etc.
If you did the above you will see your cabin in on the port side and the pointed end of the ship !!! and not far from the main reception and the Meridian restuarant, so hopefully you will enjoy your cruise, our first cruise was with Thomsons on the Saphire.