Shavon, Kerrigan, and Sophia don’t need me to explain this. They already know. Our work, even on day one, was more subtle and refined. Each of them is playing a gallery of characters during the concert, and while they sing the bejeezus out of all their numbers, some of the theatrical demands come more naturally to them than others. Sophia needed some help with Desirée from A Little Night Music; Kerrigan is looking for a way to play Venus, as conceived by Kurt Weill and Ogden Nash (and created for Mary Martin, America’s sweetheart); and Shavon is finding his way into a very funny, very off-color song by Irving Berlin called “Through a Keyhole,” which is about exactly what you think it’s about.