Katy Perry: MTV Unplugged(2009)

MTV Unplugged offered an unusual opportunity to showcase Katy Perry's work in an exposed, undercooked way and to reveal just how much of the real her had been part of that flashy presentation. Recorded in New York on July 22, 2009, Katy picked five cuts from One Of The Boys, an unreleased song, and a cover of 2003’s “Hackensack,” by Fountains Of Wayne, to perform in front of a small studio audience.

Official site