Megan Fox, 35, stunned in a hot pink outfit, while she relaxed backstage before her fiancé Machine Gun Kelly‘s epic performance in Argentina on Saturday March 19. The Jennifer’s Body star seemed super proud of her soon-to-be husband while he rocked a packed concert down in South America. Other than her amazing outfit, she posted a few photos of the 31-year-old singer performing and a few shots of the pair relaxing before the show.