SAN FRANCISCO, CA - AUGUST 21: Actress Emily Ratajkowski and actor Zac Efron get on stage at 'We Are Your Friends' tour afterparty on August 21, 2015 in San Francisco, California. (Photo by Miikka Skaffari/Getty Images)
SAN FRANCISCO, CA - AUGUST 21: Actress Emily Ratajkowski and actor Zac Efron get on stage at 'We Are Your Friends' tour afterparty on August 21, 2015 in San Francisco, California. (Photo by Miikka Skaffari/Getty Images)