Update 01/17/09: correction, please see Jenny’s comment below.
h/t to Jwuo. Apparently Bolivian president Evo Morales and other South American leaders are making an appearance on the Simpsons. Can you guess who is who? (Answer after the jump)
From left to right: Morales – Bolivia, Rafael Correa – Ecuador, Hugo Chavez – Venezuela, (?? Maybe Juanes?), Alvaro Uribe – Colombia, Alan Garcia – Peru, Lula da Silva – Brasil.