Ever since Britney and Justin made head-to-toe jean ensembles a reality, the fashion world has been following suit. The Spring '15 runways featured purses, suits and even ball gowns in the iconic material — so it's no surprise that celebs have fallen hard for the denim dress. Scared that cowgirl chic may not be your thang? No worries — behold some It-girl approved ways to style 'em up...