The upmarket fashion group said retail sales rose 22.8 per cent year-on-year in the eight weeks to 3 January.
Online sales also soared 66 per cent, boosted by an overhaul of its US website in July.
The retailer snubbed the furious discounting frenzy which engulfed the British high street, making "no significant promotional activity before Christmas".
It said sales since the Christmas period have been strong and its expects to end the year with a "clean stock position".
Ray Kelvin, the company's founder and chief executive said:
The group has delivered a great performance over the Christmas period across our global markets and distribution channels.
Further underlying growth and brand momentum has been delivered as a result of our unswerving focus on product quality and the passion and dedication of our skilled team.
Clothing retailers such as M&S and Next have delivered disappointing trading statements for the Christmas period, with many blaming the weather for poor sales.