Vans representatives were set to announce the tour lineup on Friday night, but the news was leaked when a YouTube announcement of the lineup appeared on the web on Wednesday.
Speaking to Billboard, Warped founder Kevin Lyman said of the leak: "We planned on announcing the final main stage acts at midnight [tonight], our guy had to go in on YouTube Wednesday evening [to set up the YouTube announcement] and it was an open system for less than a minute and a half. But 11 kids got to view the website, and now the announcement of the lineup is everywhere"
The lineup will also include rockers August Burns Red, Against Me, Attack Attack, 3Oh!3, and Gym Class Heroes as well as 86 previously announced bands.
Katy Perry and Taylor Momsen's band have The Pretty Reckless previously played the Warped Tour.