It's-a mitzvah: Moscow-born Svetlana Portnyansky (www.svetlanaportnyansky.com) has cornered the patchwork-music market. Weaving Yiddish, Hebrew, Russian and assorted other worldly musical styles into her repertoire, Portnyansky is like Streisand with an Ivy League degree in international studies. While she is most famous in America for performing the soundtrack to Spielberg's Survivors of the Holocaust and gracing the stage at Carnegie Hall, her stateside appearances (particularly in the Midwest) are rare. So be sure to catch this Jewish culture crusader on Saturday, September 16, at 6 p.m. at the Jewish Community Center (2 Millstone Campus Drive, Creve Coeur; 314-442-3217). L'chaim.