We love Mario the Mole, we really do - but last night he admitted something very worrying. It turns out that BB fan Mario's favourite EVER housemate is...wait for it...Tracey Barnard. Yep, the pink-haired crazy raver who wanted us all to "av iiiiiit" during Big Brother 8. OK, so Tracey is nowhere near being the worst housemate ever, but the best? Really? We have to admit we're seriously worried about Mario's judgement. Still, we suppose it could have been worse - he could have said he liked the other Mario the best. Who is YOUR favourite housemate of all time?