The "Teenage Dream" singer hit 39.8 million followers this month, but that still makes her only the second most followed person on the entire social network - Justin Bieber still reigns supreme as #1. The rest of the top five are President Barack Obama and Taylor Swift.
It has been a very busy week for Katy. In addition to announcing her new album's release date, she is reprising her role as the voice of Smurfette in The Smurfs 2, joining Britney Spears for her song "Ooh La La," and releasing her third perfume, Killer Queen.
Katy sent a gold-painted semi around LA to promote Prism and has promised fans that she'll retweet anybody who posts a Twitter pic of the vehicle.
Find the #PRISM semi, take a picture and I'll RT you. Don't worry, Los Angeles is just the first stop on the map.— Katy Perry (@katyperry) July 30, 2013
One thing she hasn't been tweeting about lately, though? Her on-again relationship with John Mayer.
When Katy appeared on the cover of Vogue's July issue, she played the reporter a song about John - but she hasn't said whether that song appears on the album or not. She did talk about her man, though, saying "I still am madly in love with him."