"It's party time, @katyperry!" Twitter's official account tweeted. "With 90 million on the guest list, we're gonna need a really big dance floor."
In close competition to Perry's impressive social status are fellow pop stars, Justin Bieber, with 83.8 million followers, and Taylor Swift, with 79 million.
Perry, who calls her beloved followers, "KatyCats," is an active Twitter bird. She tweets what she eats, promotes her favorite music and advocates for political action. Recently, Perry urged her followers in America to register to vote and support Hillary Clinton.