CREATE TABLE table_41389 ("Episode Number" FLOAT, "Air Date" CLOB, "Guest Host" CLOB, "Musical Guest  ( Song performed ) " CLOB, "Coat Of Cash Wearing Celebrity" CLOB)

What is the Musical Guest (Song performed) for the episode aired on 13 july 2008?
SELECT "Musical Guest (Song performed)" FROM table_41389 WHERE "Air Date" = '13 july 2008'
SELECT "Musical Guest (Song performed)" FROM "table_41389" WHERE "Air Date" = '13 july 2008'