Popular items this Christmas included:
- Earmuff headphones - improving figures for electrical retailers
- All-in-one-pyjamas known as "onesies" - boosting clothing sales
More top news
More than 400 people have died in a week of bombardment in rebel-held eastern Ghouta in Syria.
Coldest air yet to arrive
The band's hit singles include You To Me Are Everything, Can You Feel The Force?, and Can't Get By Without You.