Young shoppers flock to online fashion group's Nasty Gal and PrettyLittleThing websites The online fashion group Boohoo has emerged as a Christmas winner after young shoppers made a beeline for its PrettyLittleThing and Nasty Gal websites. Its arch-rival, Asos, issued a shock profit warning before Christmas, but Boohoo was able to report strong growth in demand for its £6 dresses and £10 jeans.