Ask a few people to name the world's three most famous people and chances are their answers will include Michael Jackson and Barack Obama, the two most popular celebrities on Facebook.
But only the most devoted fans of the "Fast and the Furious" film franchise would include in that list Vin Diesel, Facebook's third most popular celebrity.
The action film star may not be a pop icon, or presidential material, but he has drawn a stellar following of more than 5 million fans to his page, which he updates frequently with photos, status posts and video clips.
It should come as no surprise to learn that Megan Fox has earned her place on a popularity list.
The Hollywood vixen has attracted rabid devotion ever since she graced the screen as the starlet of the blockbuster film "Transformers," her sultry magazine poses and her provocative quotes.
Fox has nearly 4.5 million fans on her Facebook page, and she honors their dedication by adding glamour shots -- albeit infrequently -- to her page. (Not that there's any shortage of photos on her site; fans have added 975 of their own.)
Will Smith's Facebook wall may be slightly bare, but he more than compensates by chocking his profile full of songs, videos and photos. The former TV actor turned rapper turned movie star has more than 4 million fans on his page. Notable among the videos are personal messages from Smith, including a Fourth of July shout-out to his fans.