REGINA SPEKTOR A self-proclaimed “nerd” lets fans into the live music-making process In 2009, Regina Spektor’s director friend Adria Petty convinced her that the time was right to preserve one of her concerts on film. Petty (daughter of Tom Petty) traveled across England on tour with Spektor, filming behind-the-scenes footage, then shot her show at the Hammersmith Apollo. That performance is documented on the new DVD and CD set Live in London,...