Sorry Justin Beiber, you're no longer the most popular celebrity on Twitter.  So who has the most followers?  These are the current four most popular celebrities on Twitter.Kim Kardashian isn't in the top four?  Shocking, I know.  So who is everyone following?

CNN reports Katy Perry is currently the queen of Twitter, with 46.7 million followers.

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President Barack Obama has lots of Twitter followers too.  39.4 million to be precise.

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Comedian and talk show host Ellen DeGeneres has 23.4 million followers.

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Actor Ashton Kutcher has 15.2 million Twitter followers.

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Do you follow any of the top four?