Looking for a fast and sleek way to tame an unruly mane? Trust us — go for a pony! What other fix-it for the long-tressed vixen can go from sleek and sophisticated to fresh and fun with the turn of a head? (Hint: NONE) It’s easy-peasy, girlies! And we saw just HOW simple (with a little help from Conair) backstage at Fashion Week…