CREATE TABLE table_27455867_1 (callback_venue VARCHAR, episode_air_date VARCHAR)

What was the callback venue for the audition city in the episode aired on January 20, 2011?
SELECT callback_venue FROM table_27455867_1 WHERE episode_air_date = "January 20, 2011"
SELECT "callback_venue" FROM "table_27455867_1" WHERE "January 20, 2011" = "episode_air_date"