Katy #1

KATY DID, UPDATE: Well, that didn't take long. Following a setup filled with clever, mysterious teaser videos, Katy Perry's new single, "Roar" (Capitol), is already Top 10 on the Mediabase Top 40 chart—and is now the #1 single at iTunes. You can check out the new lyric video in the "Hot Tracks Impacting Radio" item below. This anthemic collaboration between Perry and Dr. Luke, Max Martin and Bonnie McKee, among others, is the leadoff single from the 10/22 album Prism. What more, it's been officially announced that her debut performance of the song will be at the MTV VMAs on 8/25. (8/12p)