Group 1 - The film "Superman" has dominated the North American box office since its premiere, maintaining the top position with a weekend box office of approximately $57.25 million, despite a 54% drop from the previous weekend [1] - "Superman" has grossed around $235 million in North America and surpassed $400 million globally since its release on July 11 [1] - The overall North American weekend box office for July 18-20 was approximately $131 million, a decrease of about 30% compared to the previous weekend, but has remained above $100 million for ten consecutive reporting periods [1] Group 2 - The horror film "I Know What You Did Last Summer" debuted with approximately $13 million, ranking third in the weekend box office, but received poor reviews with an IMDb score of 5.7 and a Rotten Tomatoes freshness rating of 38% [2] - The animated film "Smurfs" opened with about $11 million, placing fourth, and also received unfavorable reviews, with an IMDb score of 4.4 and a Rotten Tomatoes freshness rating of 21% [2] - The western comedy-drama "Eddington" debuted with approximately $4.26 million, ranking seventh, and received a better reception with an IMDb score of 7.0 and a Rotten Tomatoes freshness rating of 67% [2] Group 3 - The animated film "How to Train Your Dragon" dropped to sixth place with a weekend box office of about $5.35 million, having grossed approximately $251 million in North America and $581 million globally [3] - Upcoming releases include "The Fantastic Four: First Steps" and "House on Eden," set to premiere on July 25 [3]