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CHICAGO, IL - AUGUST 19: Emily Ratajkowski and Zac Efron attend the Chicago premiere of 'We Are Your Friends' at Showplace Icon Theater on August 19, 2015 in Chicago, Illinois. (Photo by Timothy Hiatt/Getty Images)

CHICAGO, IL - AUGUST 19:  Emily Ratajkowski and Zac Efron attend the Chicago premiere of 'We Are Your Friends' at Showplace Icon Theater on August 19, 2015 in Chicago, Illinois.  (Photo by Timothy Hiatt/Getty Images)