If ever a play was made for a costume designer, it was Crowns, the first of American Stages new series of Not-Shakespeares-in-the-Park. Regina Taylors work was a gospel-song celebration of the church hats worn by African-American women and featured a great deal of discussion of hat philosophy, psychology, etiquette and folklore. Costumer Cianci rose to the occasion. She gave us red hats and green hats, purple hats and white hats, some looking like space ships, some like mountaintops, some like roulette wheels. And for a moment of relief she even gave us a baseball cap (worn backwards, of course). In sum, Crowns was a costumers dream; and Cianci, the dreamer, dreamed a splendiferous rainbow.