Lady Gaga, Queen of All Social Media

Lady Gaga has overtaken Britney Spears to become the most-followed person on Twitter, an accolade she acknowledged with a typically goofy thanks to her 5.7 million Twitter followers.

Last month she topped 10 million fans and took over the crown from Barack Obama as the most popular living (Michael Jackson's Facebook fan page is still #1) person on Facebook, which she accepted with this B&W video to her fans.

For what it's worth, she doesn't top all celebs on social media: Justin Bieber is the most-listed on Twitter, a distinction she likely couldn't care less about.