“My Friend Katy” is a rock/pop performance built around Jamie Lee’s onstage persona and the recurring figure of “Katy,” staged here as a live set at Union Hall in Brooklyn. The piece moves like a diary read aloud, with songs and spoken passages tracing friendship, projection, and the way identities get edited in public. No specific New York premiere history is documented, but its setting in a small NYC room matters; the work’s intimacy is part of its argument. One clear strength is its attention to how a character can be both real and invented.