Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many audition city's are there with an episode air date of June 24, 2010?

### Inputs:
table_name: table, columns: ['Episode Air Date', 'Audition City', 'Audition Date', 'Audition Venue', 'Guest Fourth Judge']

### Response:
SELECT COUNT Audition City FROM table WHERE Episode Air Date = June 24, 2010