Battleship Beauties' Style BattleFrom London to L.A., Rihanna and Brooklyn Decker are competing for best dressed at their film's premieres

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SYDNEY PREMIERE

Both stars opted for full-length black ensembles to fete the film Down Under, but Rihanna borrows from the boys in a faux-wrap Stella McCartney jumpsuit, while Brooklyn Decker goes for an edgy evening wear look in gold-sleeved J. Mendel.