Christopher Nolan's Interstellar had another fantastic weekend at the international box office. Playing in 63 markets, the movie added $107.9 million for an early total of $225.8 million.In China, Interstellar earned $41.7 million over its first five days. That's the second-biggest debut ever for Warner Bros. behind Pacific Rim (which received a boost from 3D pricing). The movie is now virtually guaranteed to earn over $100 million in this market.Interstellar's holdover markets dropped just 21 percent on average, which is a great hold for this kind of release. In South Korea, it was up 11 percent to $15.8 million, which brings its total to a stunning $35.9 million. Within a week, it will be the highest-grossing live-action import since Iron Man 3.The movie also held on to first place in the U.K. ($6 million), Russia ($5.5 million), France ($3.9 million), Germany ($3.8 million), Australia ($3.25 million), Italy ($3.1 million) and Spain ($2 million).So far, Interstellar is tracking 14 percent ahead...