Does this hand sign mean anything?

Some people freak out when they see celebs displaying this hand sign. (That's Dencia and Mikel Obi above) Some say it's the Illuminati sign. I have no idea what it is really, but I think that most of the people who display this hand sign don't even know what it means...and I also think this Illuminati thing is being blown out of proportion. Not every Tom, Dick and Mariah can get into the organization, for those who believe in its existence...