Big Brother 11 starts in one week, and Davina McCall has been reminiscing about previous series. In this exclusive clip, the show's host shares her opinions on former contestants. She brands Nasty Nick the "most scheming" and calls Nikki Grahame the "funniest, most awesome and most memorable". When it comes to her favourite, Davina says: "Brian for a long time was my favourite housemate because he made me laugh, laugh, laugh, and then Nadia overtook Brian. There was something really joyous about her in a really bad mood!" Check out the video below and head to MSN UK to hear more from Davina's interview.