It’s true, last Friday night we were indeed at the Katy Perry concert in Brooklyn. As you might imagine, the production value was beyond, beyond — the costumes, the fireworks, the guitar players on wires, and the BALLOONS. And Katy herself is a seriously great performer. Very girly, very colorful and very joyful, my daughters declared it the best concert of their lives. I have to agree, she has set the bar rather high…