There’s always a certain appeal to the idea of two talented twin sisters performing together. Christina and Michelle Naughton, both graduates of the Curtis Institute of Music, have traveled the world performing piano duos everywhere from the Hong Kong Philharmonic to the Herkulessaal in Munich. The 23-year-old twins started playing the piano at the age of four, and open the Napa Valley Symphony’s season with critically acclaimed conductor Josep Caballé-Domenech handling the baton for a program of Poulenc, Mozart and Brahms on Sunday, Sept. 25, at the Lincoln Theater. 100 California Drive, Yountville. 3pm. $30–$50. 707.226.8742.