Amanda Holden and Simon Cowell were hilariously roasted in a video spoof of the Queen's speech.The Britain's Got Talent stars were the target of some epic silver tongued jokes by David Walliams, as part of his Alternative Queen's Speech.First it was Amanda's legendary, risque outfits that were in the Queen's, errr David's crosshairs: "Amanda Holden will be made an OBE for her environmental work, she always ensures her dresses use a quarter of the normal amount of fabric."RELATED: Amanda Holden's