OK, so it's a little early in the day to show you something quite so disturbing, but we simply couldn't resist sharing this hilarious picture. It's hard to believe, but this blonde Marilyn Monroe lookalike is none other than Piers Morgan! We know! The Britain's Got Talent judge donned the wig, dress and make-up to sing Happy Birthday to Britain's Got More Talent host Stephen Mulhern. We're not sure if Stephen's a big Marilyn Monroe fan, but it's likely he won't be anymore after this fright. Oh, we're being mean. We actually think Piers is a pretty good sport. We can't imagine a certain Mr Cowell ever doing anything like this...