Can I still answer, eventhough it's not Friday!!
1. Colour-changing (just to be awkward!)
2. Star (well - pentacle actually, as I'm Pagan)
3. Mince pies
4. The Holly and the Ivy (originally a Pagan carol)
5. Colour co-ordinated (green tree with red & white Scandinavian style decs at home, purple with purple and silver at our static caravan).