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

### Instruction:
What is the Musical Guest (Song performed) for the episode aired on 13 july 2008?

### Inputs:
table_name: table, columns: ['Episode Number', 'Air Date', 'Guest Host', 'Musical Guest (Song performed)', 'Coat Of Cash Wearing Celebrity']

### Response:
SELECT Musical Guest (Song performed) FROM table WHERE Air Date = 13 july 2008