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Before facing Simon Cowell, Piers Morgan and Amanda Holden, ex-Army driver Glyn described his act as "totally unique - when the judges see it they won't ever see anything like this again".
Wearing a flat cap and raincoat, Glyn took to the stage and launched into a rendition of Right Said Fred's 'I'm Too Sexy'. He then shocked the trio of judges and the audience by removing his raincoat, revealing that he was only wearing a chicken thong underneath it.
Simon, Piers and Amanda quickly used their buzzers to stop Glyn in his tracks, but it seemed that Morgan was the only one who had not been left speechless. He said: "Glyn, I don't know what that was but that's not talent."
Britain's Got Talent airs on ITV1 at 8.05pm tonight.
