Singer's ultra-personal songs and high-flying stage show set her apart from traditional pop stars, in Bigger Than the Sound.By James Montgomery Pink Photo: Andrew MacPherson A few weeks ago, as I sat in Radio City Music Hall watching Pink dangle upside down from a trapeze bar some 60 feet above my head, risking life and limb (and avoiding a wardrobe malfunction) while positively nailing the chorus of "Sober" — the smart, stunning song she co-wrote with "American Idol" judge Kara DioGuardi — I sort of realized something: Pink is totally underrated. Think about it.