At YouTube.com, the popular video upload site, sandwiched between Natalie Portman's obscene Saturday Night Live rap and the Rolling Stones' 1963 Rice Krispies ad, are numerous amateur videos of adolescent females lip-synching to Pink's “Stupid Girls.” This single from her new album, I'm Not Dead, is a forthright denunciation of celebrity-obsessed, fashion-besotted, weight-anxious, cerebrally-challenged young American females, and a lament for the progressive aspirations that die with each dormant brain cell: What happened to the dreams of a girl President / She's dancing in the video next to 50 Cent . . .