What is the most popular group on facebook?

The Michael Jackson one is a PAGE, not a GROUP. The real biggest group on Facebook is 'Six Degrees of Separation- The Official Experiment'

err hello to the guy above me... but that ain't right brother :P in fact the actual largest group is technically the facebook developers group :D

but ive saw a group with 8.5 million people its called "facebook" lol-not joking

^^ yeah but the Texas Hold'em Poker group has got 18,341,803 fans