f(x) perform “1, 2, 3″+ “Electric Shock” on ‘M! Countdown’ The girls of f(x) have prepared special performances for the Christmas special of ‘ M! Countdown ‘! f(x) performed their cover of the Peppertones ‘ song “ 1, 2, 3 ” from SMTOWN ‘s eighth winter album, ‘ 2011 Winter SMTown – The Warmest Gift ‘ as well as their past hit “ Electric Shock “. Check out their special stages below! “1, 2, 3″ “Electric Shock”