“I find beauty in the dark side or in people’s anger!’” confesses a boisterous Anna Tsuchiya. Surprisingly, Japan’s choice wild-child actress, model and singer did not talk about herself egotistically, but merely justified her love of Chopin over Mozart: ‘‘When I (first) listened to Chopin’s ‘The Revolution’, I thought classical music is rock music’’ she says. ‘‘It was beautiful and I wanted to go into rock!’’ Tsuchiya, 25, is gearing up for her performance at the New Classic Gig, a unique live event that sees unlikely musicians paired with a full orchestra, all as part of a fashion show directed by creator Hideki Matsui.