The evenings, which will be held in the Kennedy Center's Concert Hall, are part of the National Symphony Orchestra series. "NSO Pops: An Evening with Roberta Flack" will be presented Sept. 27 at 7 PM and Sept. 28 and 29 at 8 PM. Tony Award winner Marvin Hamlisch will conduct the famed orchestra. De Haas is scheduled to perform songs from Les Misérables and Porgy and Bess as well as tunes by Billy Joel.

Darius de Haas has appeared on Broadway in Marie Christine, Kiss of the Spider Woman, Carousel, Rent and The Gershwins' Fascinating Rhythm. He created the title role in Running Man for which he received an Obie Award, and his other theatrical credits include The Bacchae, Saturn Returns, Children of Eden, Once On This Island and I Was Looking at the Ceiling and Then I Saw the Sky. De Haas was also part of the benefit Hair and Pippin concerts. His debut solo recording, on the PS Classics label, is titled "Day Dream: Variations on Strayhorn."

Tickets, priced $20-$85, are available by visiting www.kennedy-center.org.