How sweet is Alexa Chung's sweater? We fell hard when we saw Ms Chung doing her ambassador thang at the launch of the Annual British Designer Collective in London today. Lex paid tribute to another style icon, Jane Birkin, via her cheeky Bella Freud Je t'aime Jane knit which, btw, you can buy here. Her text-emblazoned top gave a graphic edge to her flirty floral skirt from Céline's Resort '12 collection. To finish, Lex donned a pair of patent penny loafers from Nicolas Kirkwood. Quirky with that school-girl-meets-tomboy vibe, this look is textbook Alexa. Like her scibe-inspired sweater? We found five knits with something to say.