A couple of weeks ago Justin Bieber become the most followed (i.e., most popular) profile on the entire Twitter network, usurping long-term numero uno Lady Gaga.

Since then, Bieber hasn’t looked back, extending his lead over Gaga to a couple hundred thousand followers. Indeed, Gaga faces increasing pressure for the #2 spot on Twitter from Katy Perry – as we’ve seen time and again on Twitter, nobody is safe in the top spot, no matter how popular they seem at the time.

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