Mother-monster has the highest Twitter-following in the world of music.
Lady Gaga has reached the impressive milestone of 20 million Twitter followers.
This makes her the most popular person on the social networking site and the first person to reach this landmark.
Lady Gaga took the throne as the celebrity with the highest number of online fans on the popular site when she overtook Britney Spears in August 2010. The pop princess now has 13.5 million followers but is not as active a tweeter.