The Duchess of York made the comments to talk show host Oprah Winfrey in an interview to air Tuesday. The interview was taped Friday in Los Angeles, and excerpts were released Monday by Winfrey's Harpo Productions.
Ferguson tells Winfrey that she'd seen snippets of the video in airports but had not "faced the devil in the face" by watching it in its entirety. But she says she could tell she'd been drinking and was "in the gutter at that moment."
Ferguson has apologized for her lapse of judgment and has said she had financial problems.
