Oprah's Pedicurist -- Her Feet are NOT Corny

EXCLUSIVE

Oprah's feet are a thing of beauty ... so says the lady who works tirelessly to keep her hoofs beautiful.

Gloria Williams -- a.k.a. FootNanny -- was outside 1-Oak Friday night when we put her feet to the fire.

Footnanny was pretty tight lipped -- but our takeaway is O is corn and bunion free.

BTW -- she charges $150 an hour.