When Broadway’s Liz Callaway and cabaret’s Ann Hampton Callaway blend their voices together in perfect harmony, the result is, simply put, exquisite. Ann’s dark, husky, jazz-flavored sound is the perfect complement to Liz’s clear bell-tones. In their show appropriately titled BOOM!, they put their unmistakable stamp on solos and duets of such baby boom generation hits as “Both Sides Now,” “Up, Up, and Away,” “Bridge over Troubled Water,” and “Downtown,” among other classics, while sharing heartwarming and humorous stories of growing up in Chicago and New York.