The South Korean box office saw a surge in activity during the weekend of May 1–3, as high-profile international sequels drove audience turnout. According to data from KOBIS, the tracking service operated by the Korean Film Council, “ The Super Mario Galaxy Movie ” claimed the top spot in its opening weekend, earning $3.8 million from 575,467 admissions. Since its mid-week debut on Apr. 29, the film has grossed a cumulative $4.5 million and captured a 31.47% revenue share. In a close second place, “ The Devil Wears Prada 2 ” made a fashionable debut, earning $3.3 million over the weekend. The film has reached a cumulative gross of $4.9 million from 736,033 admissions. Popular on Variety Local horror hit “Salmokji : Whispering Water” moved to third place but remained a strong contender in its fourth week. The film earned $2.7 million over the three-day period, bringing its cumulative gross to $18.3 million from over 2.6 million admissions.…