Britney Spears has achieved a rare social networking feat by becoming one of very few people to have over 10 million followers on Twitter. 

The 'Piece Of Me' superstar now has more that 10 million fans subscribed to her tweets and it puts her alongside Justin Bieber, Lady Gaga, Katy Perry, Kim Kardashian and Barack Obama, who have also all managed the impressive milestone. 

Over the past few weeks, Spears has been interacting with fans that have attended dates on her Femme Fatale tour and feedback she has received shows that she's still the undisputed princess of pop. 

Watch part of her current tour below: