Between them, the sisters Callaway cover a wide range of vocal disciplines. Ann Hampton is a cabaret swinger whose vocal prowess was amply displayed in her Tony-nommed turn in the Broadway revue “Swing.” Liz’s more legit soprano has graced such Broadway tuners as “Merrily We Role Along,” “Miss Saigon” and “Baby.” In this cabaret revue, “Relative Harmony,” the sisters soar together and individually through a 13-number set that ranges from beautiful introspection on Carly Simon’s “That’s The Way I Always Heard It Should Be,” to a sizzling romp through Jon Hendricks’ jaw-breaking adaptation of the Jimmie Harris bebop classic, “Cloudburst.”
The interplay between Ann and Liz is casually edgy as they acknowledge their sibling similarities and differences with Ann’s original “Here Come the Callaways” and the buddy medley “As Long as We’re Together/Together Wherever We Go.” As a duo, it is their ability to seamlessly wind themselves around each other vocally that impresses. This is especially rewarding with Van Morrison’s “Moondance,” as Ann deliciously snakes her way harmonically in and around Liz’s lead vocal line. However, the showstopper of the evening begins with Liz’s power-torch rendition of “Stormy Weather” segueing into Ann’s beautifully realized vocal on Ted Koehler’s “When the Sun Come Out.”
Their individual turns prove each is a sublime soloist who can more than hold an evening on her own. Liz displays her legit chops with a medley of the love ballads, “Make Someone Happy” and “Something Wonderful,” lightheartedly acknowledging her 18 years of happy marriage “to the stalker” who relentlessly pursued her when she was in the chorus of her first Broadway effort, “Merrily We Roll Along.”
Ann Hampton Callaway is a much sultrier performer, belting out such ballads as Jerry Herman’s “If He Walked Into My Life” and her own “My Answered Prayer.” She also provides the comedic highlight of the evening, happily opening the show with a bouncy rendition of the Julie Stein/Stephen Sondheim anthem “Some People,” while sister Liz is forced to hobble onto the stage, bound and gagged.