Lady Gaga Beats Justin Bieber and Katy Perry (Top 12 of Jan. 2012)
The milestone comes less than a year after the singer became the first person to score 10 million followers on the social networking site.
"Can't believe I have 18,000,000 TwitterMonsters, really rad, was just a few years ago I had barely any," tweeted Gaga. more on this story
popmusiclife is an official news provider for the antiMusic.com.