But while the 8 Mile star is the reigning king of Facebook, Gaga and Rihanna are Twitter royalty. Gaga rules the microblogging site with 27.8 million followers, narrowly beating out Justin Bieber and his 25.8 million Beliebers. With 23.4 million followers, Rihanna's doing pretty well on there too. Eminem, however, lags behind his fellow artists with only 11.8 million followers. 
 
 Time to step up that Twitter game, Em! 

 In case you missed it, all 3 rounds of the #Southpaw Sessions are live now. Catch it in full here: https://youtu.be/1NCjLxKK_OI 
 
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– It's all about Lady Gaga and Justin Bieber on Twitter, but when it comes to Facebook, Eminem wins. The rapper is the most popular artist on the site, the first to rack up 60 million fans. Rihanna is a close second with 59 million fans, E! reports, while Lady Gaga has 53 million. Compare that to Twitter, where Gaga has 27.8 million followers and Em has just 11.8 million.