The pop star postponed three shows in Missouri, and her native Nashville, Tennessee, last week after she was hospitalised following an "extreme" reaction to antibiotics she was taking for a sinus infection.Cyrus has now decided to postpone all the upcoming dates on the American leg of her Bangerz trek, rescheduling them for August.A statement posted on her official website reads: "All remaining US dates on the Miley Cyrus Bangerz tour have been postponed. Miley is continuing to recover from the severe allergic reaction she suffered on April 15. Existing tickets will be honoured on the new dates, which include previously cancelled and postponed dates."The US tour will resume in New York on 1 August. She is still expected to continue with the European leg of the jaunt, which kicks off on 2 May in Amsterdam, Holland.