Selena Gomez's Fan-Tastic Day at the Miami Mall
06/23/2011 AT 05:00 PM EDT
Selena Gomez drew thousands of admirers (and their parents!) to the Miami International Mall in Doral, Fla., on Tuesday, where she was promoting her new film, Monte Carlo. "There were so many fans there you could hardly walk," a source tells PEOPLE. "It was amazing."