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The day after providing the soundtrack to Kate Bosworth and boyfriend Michael Polish's very public, heated fight and reconciliation on the dance floor at the Swarovski CFDA Awards after party at Boom Boom Room in NYC, DJ Mia Moretti was bringing the house down here in L.A. Although there weren't any dramatic breakup and makeup scenes Tuesday night at The Writers Room, the night was plenty action-packed as the DJ was back together with her violin' partner Caitlin Moe to put on one of their signature performances.