In TheatreWorks' jubilant production of Regina Taylor's musical play, a Brooklyn teenager sent to live with her grandmother in South Carolina following the death of her brother learns that a hat isn't just something you wear on your head; it's an entire mode of self-expression. You can flirt in a hat, pray in a hat, but one thing you must never, ever do is touch or ask to borrow someone else's hat. Channeling the Lord and good fashion sense through high-energy gospel and blues numbers, Grandmother Shaw and her cronies -- five churchgoing queens with crowns -- sing about the profound and not-so-profound role hats play in their lives. Decorated with more colorful headgear than the Macy's and Nordstrom millinery departments combined, the brightly bedecked cast and stage resemble a tropical coral reef. Though lighthearted and bombastically performed, Crowns is not an entirely frivolous affair. The shadow of death and the struggle for civil rights provide a sobering backdrop to all the feisty hattitude.