Justin Bieber was backstage enjoying his girlfriend Selena Gomez‘s concert in Boca Raton, Florida last weekend with his pal Sean Kingston, when fans realized he was there and rushed to get to him. Although he’d tweeted a message to Twitter followers earlier in the day that read, “Good to be back home in Canada,” a fan spotted him standing in the wings while Selena was performing. Earlier in the tour, he’d joined Selena onstage and performed a couple of songs with her, but he didn’t get the chance this time, as word spread around the Mizner Park Ampitheater that he was there. When dozens of girls suddenly charged towards him, Justin had to escape out a back door. He jumped into a waiting car, narrowly missing being trampled by a crowd of screaming teenage girls.