It's appears like Posh is thinking "he's making fun of me, but that's not me! He's making fun of himself, but that's not him!" Someone's got to be higher/lower than, and everybody's got to be for real. She should move to California. It looks as if she had a minor identity crisis there--like, "If I'm not me and he's not him, who the hell are we?" and that's often the unfunny point for many serious artists such as Posh Spice.
Baby was with it, though.