CAMERON Diaz and Gwyneth Paltrow caused a stir when they rocked up at a wedding fair. The A-list pals decided to check out the exhibits at the Windsor Wedding Show, which was being held at the plush Sir Christopher Wren Hotel where they were staying, the Daily Mirror reported.A source revealed that the actresses “were chatting away and they wandered into the do” where they checked out the cakes, photographers and dresses on display.“They were giggling and aahing at all the displays,” the insider added.Gwyneth, who is married to Coldplay frontman Chris Martin, and Cameron, who has previously insisted she’s in no hurry to wed, later hired out a boat together on the Thames.Cameron is currently in the UK filming new Ridley Scott movie The Counsellor.        –SS