We know D.C. Get our free newsletter to stay in the know.

In conjunction with the exhibit “Louis Armstrong: A Cultural Legacy,” the National Portrait Gallery will be presenting “Jazz Lady,” a special salute to several of the many vocalists who worked with the legendary trumpeter. Olney Theatre actress and cabaret singer Beverly Cosham, former Lettumplay member Jeanie Marshall, and D.C.’s “First Lady of the Blues” Mary Jefferson will perform songs identified, respectively, with Billie Holiday, Ethel Waters, and Bessie Smith. Jefferson, who sang and danced at the Howard Theater and several U Street clubs in the ’40s and ’50s, and who recalls seeing at age 10 blues diva Smith, should be a special treat, as this personable D.C. institution is on the rebound from a heart attack and sings infrequently. At 7 p.m. at the National Portrait Gallery’s Great Hall, 8th & F Sts. NW. FREE. For reservations call (202) 357-2920. (SK)