Or she could have just been curling her toes FOR NO GOOD REASON. Why the hell would she be tickling her own foot during an interview?? Ever think maybe she was scratching an itch? Or maybe something was stuck to the bottom of her foot? Jeez people....ITS ONE SECOND LONG!!! You're acting like it was the holy grail of mainstream scenes or something........
I mean if ya want really evidence of foot-related Britney stuff, I seem to remember a while back reading on a foot forum that she was asked in an MTV interview what she thought was romantic or sexy that a guy can do for her, she responded "Kiss my feet". There, NOW THATS a little more ironclad, at least of a possible foot fetish....