Gomez, who stars in the Disney show "Wizards of Waverly Place," issued a statement saying she was disappointed she had to cancel the shows. Gomez also has the starring role in the film "Ramona and Beezus," which is currently in theaters.
Delaware State Fair officials said the show could not be rescheduled before the end of the fair, and full refunds will be given to those who purchased their tickets directly from the Delaware State Fair. The Ohio show was rescheduled for November.
Delaware fair officials said Allstar Weekend will perform in Gomez's place for free.