I like both of them! I love Slim Shady/Eminem/Marshall Bruce Mathers III cos he's great for when I'm rebelling against my parents (I think that the best songs he's done are "Guilty Conscience" (with Dr. Dre) and "Stan" (with Dido)), but I like Victoria Beckham/Posh Spice for when I'm being silly (I'm "Not Such An Innocent Girl" either!) so I think that they're both great.

Mind you, if I had to go for just one of them, I'd go for the real Slim Shady!!