Pop-diva Madonna certainly knows how to shock. The singer donned her by now infamous green 'Louis Vuitton' feather dress for the second time in a new TV ad. The shocking attire worn by the 50-year-old singer at a glitzy party in New York last year was termed one of the worst fashion disasters. But Madonna apparently feels that wearing it once was not enough,the singer has now committed a further faux pas by repeating it again,the 'Daily Mail' reported. This time the pop-singer wore the shocking green feather dress as part of a new advertising campaign for a fashion house. In the shot,the star shoots a smouldering look at the camera while draping herself over a saloon bar. The last time Madonna wore the dress was in November when she turned out to the Gucci UNICEF dinner in New York.