High-energy acting, strong vocals, flawless choreography and lighting, and a clever stage play combined to showcase songs of Neil Sedaka as the Chenango River Theatre in Greene presented “Breaking Up is Hard to Do” (Friday, Aug. 19). The Eric Jackson-Ben Winters musical comedy, premiered in Albany in 2005, wove in 16 of Sedaka’s songs so well that one would think they were written expressly for this show. The principals showed their versatility in a show demanding acting, singing, and dancing. The whole cast and crew worked smoothly together with good pacing, never losing momentum or energy. Two hours seemed to fly by. On so many levels, this was a thoroughly enjoyable show!