Ethical Scheduling

A personable celebrity visits a physician in the medical system where you work. The celebrity travels frequently, and she has asked an appointment with short notice. As a person responsible for scheduling appointments, you could easily use a trumped-up excuse to bump a patient at the desired day and time to accommodate the celebrity.

Would it be ethical for you to cancel a patient’s appointment to accommodate the celebrity?
If the celebrity is a hospital patient, would it be ethical for the hospital administrator to drop in to be sure the celebrity is satisfied with her room and care?