Rihanna and Ciara stepping out in the same dress makes sense. But the pop princess and Harry Potter author J.K. Rowling? Not so much.
Back in February Rihanna, 22, wore a white strapless Oscar de la Renta gown embroidered with red flowers (which matched her fiery mane) during a performance.
Fast forward to the Harry Potter and The Deathly Hallows: Part 2 premiere in London earlier this month when J.K. Rowling chose the same design, only in green with pink flowers.