Sometimes a movie or person comes along that attracts a group of people to obsess over them. These groups of people are called fandoms. Some fandoms are popular enough to make it into the news and get group names. Others are simply known as fans and are faceless Twitter followers or names on an email list for a fan club. These are the biggest fans.

While there is no original fandom, they come in all different shapes and sizes. Between the Team Jennifer [Aniston] and Team Angelina [Jolie] T-shirts or The Beatles craze, fans can be as crazy or creative as they want to be. But one thing is for sure, these fans are dedicated to their idol, no matter what.

Recently, a trend has made it easier to become part of a fan group. There are fan groups on Twitter, who follow their idol's every tweet. There are fan groups on fan websites, where they can talk about how much they love their idol. There are fan groups that even hold conventions to celebrate the one thing that they have in common.

From Red Roomers to Warsies, there are always going to be fandoms. Here are the 10 most powerful. If you belong to one of these fandoms, be sure to tell me why you think yours is the best. And if you aren’t on the list, tell me why you should be.

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