With ‘Teenage Dream,’ Katy Perry became the first artist since Michael Jackson to have an album with five no. 1 singles. Nora and Nathan talk about the massive highs on this album, including “Last Friday Night,” “California Gurls,” and “Firework”

; the massive lows such as “Peacock” and “Hummingbird Heartbeat”

; and where Katy Perry’s career went after the huge success of this record