Lee Hyori confessed her cosmetic surgery for the first time when she attends KBS TV game show (한가위 쟁반노래방).

At the show, the host, Sin Dong-yup asked her to change shape of the nose like a pig while singing.

She politely explains that because of her cosmetic surgery of the nose, she couldn't do that.

Check the follow up story.
http://www.rukorean.com/lee_hyori_i_was_kidding

http://www.rukorean.com/lee_hyori