Wikipedia: Advanced Theory
"An artist is Advanced when they do something that is neither expected of them nor the opposite of what is expected of them." Tongue-in-cheek, but the article lives on. Note the notes on Val Kilmer and C-Murder.
Chuck Klosterman: Real Genius
On Advancement Theory: it's not bad; you just don't get it. "The most Advanced figure of all time is Lou Reed [who in] 1986 released the song 'The Original Wrapper,' in which he raps about AIDS, Louis Farrakhan, and waffles."
Jason Hartley: Advanced Theory Blog
"Your guide to understanding Lou Reed, Bob Dylan, David Bowie, and other highly Advanced musicians." If a genius does something you don't understand, it's probably even more genius.