CREATE TABLE table_40938 ("Pilot" TEXT, "Original Airdate" TEXT, "Musical Guest/Song performed" TEXT, "YouTube Hero" TEXT, "MySpace Band" TEXT)

What is the Musical Guest/Song with an original airdate of january 2008?
SELECT "Musical Guest/Song performed" FROM table_40938 WHERE "Original Airdate" = 'january 2008'
SELECT "Musical Guest/Song performed" FROM "table_40938" WHERE "Original Airdate" = 'january 2008'