Going through life with a genetic carbon copy of oneself is a difficult concept for singletons to wrap their minds around. But for twins, it's literally a way of life. And while some twins long for unique DNA, many can't imagine life without their doubles. This Sunday, twins from around the world will descend on Twinsburg, Ohio, for the town's annual Twins Days festival. To mark the occasion, I've whipped up a playlist featuring performances by some of classical music's most accomplished musical twins, like Duo Similia (above), the guitar-playing Katona Twins and the twin sisters of the Claremont and Ahn piano trios. I'll also bring you music for "twin" performing forces, and we'll even give a nod to a musical evil twin of sorts. Join me Sunday, 10 a.m. to 1 p.m., for double musical trouble on Classical 101!