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Miley Cyrus may be one of the wealthiest young singers out there, but the 18-year-old "Can't Be Tamed" singer still has to pass through airport security.

After arriving at LAX for her trip to Chicago, Ms. Cyrus was in a great mood ... smiling and chatting with fans while she waited in line to be searched by TSA. X17online exclusively broke the news that Miley is heading to the Windy City for an appearance on The Oprah Winfrey Show.

The former Hannah Montana star, wearing sexy black tights, is taping her segment with Lady O tomorrow, and Harpo tells us the episode will be airing April 13.

See Miley looking sexy from head to toe ... after the jump