Every plain woman who looks into a mirror yearns to see a pretty woman. For all her fabulous clothes and flamboyant style, Peggy Guggenheim was not pretty. But the American heiress so worshiped beauty that she took up residence in the most beautiful city in the world and greedily collected the most beautiful people and artworks of her time. She’s still plain Peggy in this adoring portrait by Lanie Robertson. But with Mercedes Ruehl blazing away like a Roman candle in Casey Childs’ stylish production, the show does for Guggenheim what a cruel looking glass never could: It reflects her inner beauty. Soul bared and heart afire, she’s not just pretty, this gawky goose –she’s gorgeous.