The crash occurred early Thursday morning on 1-70 just outside of Vandalia, Ill.
"There were five passengers on the bus, and Miranda suffered a broken ankle," her rep told the magazine. "At the time, we are told everyone will be fine."
Because of the 18-year-old's injury, the rest of her "Dancing Crazy Summer" tour has been postponed until "further notice," according to her rep. The tour was originally slated to run through Oct. 23.