How to unlock:
12th December: The band have now started to play music in the space, now all the sheet music as been found. Mission 3: Santa now asks that you help to put fairy lights on the other trees and get them running. You have to turn on 3 power points in the right order after specking to the elv outside, once done return to Santa who will reward you.

Reward Space/Game/Item: Winter Wonderland.

Found in: Redecorate Personal Space - Ornaments.