Vocalists Jan Horvath, Christiane Noll and Debbie Gravitte headline a tuneful Wolf Trap evening jam-packed with hits from Broadway’s most enduring musicals. Backed by the National Symphony Orchestra led by conductor Emil de Cou, they revisit the numbers that made “Mame,” “Evita” and “Gypsy” household names. The chemistry sizzles as each diva belts out her favorite solos, pairs off for duets or conjures up magic threefold in Andrew Lloyd Webber’s “Love Trio” and the exhilarating, tight harmony of “Sing for Your Supper” from Rodgers and Hart’s “The Boys From Syracuse.”

Horvath’s broad resume encompasses the roles of Christine and Carlotta in “The Phantom of the Opera,” Eva Peron in “Evita,” Nellie Forbush in “South Pacific,” Grizabella in “Cats” and featured soloist in the Bernstein “Mass” at the Vatican for the Jubilee Celebration in 2000.