Blast from the past!Typically paired with oversized sunglasses and towering heels, the flared denim trend is back in a major way thanks to the same leg-lengthening effect it granted women everywhere first in the '70s and again in the '90s.PHOTOS: Celebs love wearing double denimIn recent weeks, a slew of Hollywood's finest have been spotted wearing the alternative to boyfriend jeans. Sporting new shoulder-length locks...