Katy Perry is officially the queen of Twitter!
As of today, the "Dark Horse" singer has more than 50 million followers on the social networking site, making her the most-followed person in Twitter history.
Perry took to her Twitter to react to the milestone, writing, "Oh yeah AND we grew to 50 million Katycats! Eh, regular day at the office."
Today, Bieber currently has 49.3 million followers.
He then tweeted a YouTube link to Rebecca Black's 2011 viral video "Friday" and jokingly pretended to be out of the loop. "Been waiting SO long to share this with you. It's so bad it's good. Take a look," he wrote.
He also shared, "I'll be honest, when it came to rejoining twitter, I had mixed emojis."