Faithful readers will know that when Barbara Walters tries on hats, we go slightly mad for some reason and have to examine her hat choices in minute detail. On Thursday, Walters took us to London, where she met with master milliner Philip Treacy and tried on about six million hats, just like people going to the Royal Wedding would. (Did we mention that was the angle that prompted this veritable orgy of hat-sampling?) Also, we found out where that big red hat she had on a few weeks ago came from. We have collected some pictures of Walters with the hats in the handy guide below. Please tell us what you think of each hat.