Matthew Morrison, the TV and theater star with the golden pipes makes his solo debut at the Kennedy Center with his unique take and touching renditions of Broadway standards from My Fair Lady to West Side Story and other lesser-known pieces.First, the National Symphony Orchestra took the stage, at home in the Concert Hall, for a fun program of their own. The evening began with the “Overture” from South Pacific, which was a real treat to hear from this accomplished, full orchestra with almost 100 members instead of blasting from a pit under a stage. They also featured renowned arranger Nelson Riddle on a medley of Gershwin songs originally written for piano. Arrangers are everything for a Pops orchestra since there’s a much smaller canon of music actually written for an orchestra. They did two songs, “Put on a Happy Face” (from Bye Bye Birdie) and “Mack the Knife” (from Three Penny Opera) arranged by Conductor Steven Reineke. They were both delightful and Reineke spent the evening with a huge grin on his face and one hand on his heart even as he swept the orchestra through each piece.Matthew Morrison, who has been nominated for a Tony Award for The Light in the Piazza as well as an Emmy and Golden Globe for his beloved Glee character, took the stage in a snappy suit and a fedora and jumped into the Duke Ellington classic, “It Don’t Mean a Thing (If It Ain’t Got That Swing).” An apt choice, because he couldn’t stay still all night