A horse, a diva and a gymnast sell their Broadway wares
Savvy longtime stars like Cathy Rigby know how to confront perception problems head-on. After belting out a number from "Peter Pan" for the umpteenth time, the diminutive celebrity didn't exit the stage of the Pritzker Pavilion Monday night, but instead made a beeline for the emcee of the evening, TV personality Janet Davies. "You think I'm old ," Rigby said to the slightly startled host. "Look." And with that, Rigby…