Los Angeles - Lady Gaga has become the first person to amass 20 million followers on Twitter.
The pop star cracked the milestone on Monday, beating out other pop culture luminaries such as Justin Bieber, who has 18.1 million followers, and Katy Perry, whose Twitter fans number 15.6 million.
The top non-pop star on Twitter is US president Barack Obama, who has 12.8 million followers, putting him behind other world leaders such as Britney Spears, Rihanna and Shakira.
Lady Gaga also has 48.8 million fans on Facebook, and recently launched her own Little Monsters social network, an exclusive online hangout just for her fans.
It's no coincidence that she has been crowned the queen of social media. Unlike other stars, she runs her Twitter account herself, tweeting to her fans - whom she calls "little monsters" - short missives about everything from fashion advice to romantic insights.
