The 40-year-old actress made jaws drop on the red carpet on Wednesday night (24.04.13) in her revealing Antonio Beradi dress, which showed she wasn`t wearing any underwear, but she admits she had to reach for a last minute razor after realising knickers weren`t an option with the garment at the last minute. Speaking on an episode of the `The Ellen DeGeneres Show` to air today (26.04.13), Gwyneth - who was named World`s Most Beautiful Woman by People magazine this week - said: "I kind of had a disaster. I was going to a show and I changed there and I knew I couldn`t wear underwear. I don`t think I can tell this story on TV ... Well, let`s just say everyone went scrambling for a razor ... so I went from being the most beautiful to the most humiliated, in one day. I work a 70s vibe. You know what I mean?" Gwyneth - who has children Apple, eight, and seven-year-old Moses with husband Chris Martin - was shocked to learn of her title by the popular publication and was initially convinced it was a mistake, even seeking therapy to get her head around it. She added: "My publicist of like 22 years, Stephen Huvane, sent me an email. And honestly I was like this is a joke. I reread it three times. I was like, `Oh, he sent this to the wrong client. Like there`s no way.` My name wasn`t on it. I was like, `Oh this is not for me and it was actually psychologically interesting because for a minute I really thought that someone was playing a joke on me.` I talked about it with my shrink."