At this point, what more can be said about Lady Gaga, who's arguably the biggest global pop star since Madonna? Like the Material Girl, she's redefined the meaning of "socially appropriate" — whether in the realm of fashion, live performance or public behavior. Still, her taboo busting doesn't have a whiff of eau de attention whore, unlike most celebrities in the Age of TMZ. Although she's a fearless dresser — whether it's lingerie under a Yankees jersey at a baseball game or a black veil to her sister's high school graduation — and a confident interviewee, Gaga's vulnerability always hovers near the surface. And therein lies her appeal: The love she has for her fans (her "little monsters") is sincere and all-encompassing — perhaps because if she wasn't Lady Gaga, she too would be just another misfit soul looking for an icon.