Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_2 (musical_guest__song_performed_ VARCHAR, air_date VARCHAR)

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

### Accurate SQL ###

SELECT musical_guest__song_performed_ FROM table_name_2 WHERE air_date = "13 july 2008"