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For the biggest celebrity sibling FROW at New York Fashion Week, Avril Lavigne's Abbey Dawn show took out the gong. The celeb-turned-fashion-designer recruited Kylie Jenner (half-sister of her boyfriend Brody Jenner) to model in her Spring 2012 show which attracted the rest of the Jenner/Kardashian crew.

Kourtney and Kim Kardashian sat front row alongside their half-sister Kendall Jenner and Kim's new hubby Kris Humphries who cheered Kylie on. Dressed in similar white blouses, black full skirts and hair up in buns, Kourtney and Kim took photos, clapped and screamed from the sidelines as Kylie strutted her stuff in a black tulle prom dress. Lavigne's line is exclusive to Kohl's in the US and featured plenty of the singer's punk-chic pieces.