Katy Perry is ready to roar, Newsday's Glenn Gamboa reports. The "Dark Horse" singer plans to launch her "Prismatic Tour" in Raleigh, N.C., on June 22, with area stops at Madison Square Garden on July 9, the Prudential Center in Newark on July 11, and Barclays Center in Brooklyn on July 24. Capital Cities, Kacey Musgraves and Tegan and Sara will open for Perry in different markets during the tour. The public ticket sale date hasn't been announced yet. Before then, however, Citi cardholders can purchase tickets through Citi's Private Pass program starting at 10 a.m. on Jan. 21.