As of last Friday, Britney Spears became the latest celebrity to surpass ten million followers on Twitter. It's not an easy thing to do.   Britney is only the sixth person, the fourth woman and the third female musical artist to do so.  She joins the ranks of some other extremely famous people.

Who else has over ten million Twitter followers?  President Barack Obama, Katy Perry, Kim Kardashian, Lady Gaga and Justin Bieber.  It probably won't be long before singer Shakira also breaks the ten million mark.  She currently has 9.1 million followers on Twitter.  Do you follow any of the above mentioned on Twitter?