The end of summer does not mean wedding season is over. In fact, many prefer to celebrate their big days when the air's a lil' crisper, and there's no danger of sweating through a white lace gown that costs as much as a vacation. So, that means it's time to refresh your go-to party gear, and who better to help with that than Rihanna? While every other celeb was at the VMAs pondering KimYe in the White House, RiRi was serving glamour in NYC, and showing us how to dress for both the bachelorette party and the wedding. Take notes, people...