Pop star Miley Cyrus performs in Mexico City during a "Bangerz" tour stop on Friday, September 19. Earlier in the week, Cyrus was criticized for her dance moves during a concert in Monterrey, Mexico. On Mexico's Independence Day, Cyrus' backup dancers used a Mexican flag to spank the oversized fake bum Cyrus was wearing. Mexico's Interior Ministry opened a federal investigation on the matter. Here are a few other issues that have cropped up during Cyrus' tour, which she launched in February.