The award-winning actor, singer, writer and activist is bringing a different kind of musical performance to the Brown Theatre next Wednesday. Alan Cumming, perhaps best remembered as Boris from the James Bond movie “GoldenEye,” leads in a one-of-a-kind show that includes pop-hit renditions of music from Billy Joel, Lady Gaga, Adele and musical theater hits. It should appeal to the full spectrum of emotions. The show may be “a little off center,” but Cumming’s talent and brilliance is sure to provide a can’t-miss experience.