There were a number of valuable life lessons Tina Fey bestowed on us through the oft-quoted flick Mean Girls: the importance of looking both ways before crossing the road, pecking orders and how malleable the english language can be, to name just a few. But perhaps the most memorable were those involving what to wear, or rather, what not to wear. To mark the cult film’s 10-year anniversary, we’re taking a trip down memory lane.