Disney's "Pirates of the Caribbean: At World's End" remained atop the box office in North America for the second weekend despite a big plunge, as Hollywood saw the red hot summer season featuring three blockbuster sequels begin to cool off a bit.

The box office champ in theaters in U.S. and Canada this weekend was again the latest film of Disney's "Pirates" franchise, which took in some 43.2 million dollars in ticket sales in the three-day period, according to estimates released by box-office tracking firm Media By Numbers here Sunday.

The third installment of the "Pirates of the Caribbean" franchise, inspired by a popular ride in the Disneyland amusement park, has sold 216.5 million dollars in North American in the past 10 days since its release. The film has grossed 625.3 million dollars worldwide so far.

Universal's pregnancy comedy "Knocked Up," with 29.3 million dollars in estimated ticket sales, debuted No.2 at the box office, while MGM's new release "Mr. Brooks" was at No. 4 on the list with 10 million dollars.

Former box office leaders "Shrek the Third" and "Spider-Man 3" continued to do top-five sales over the weekend, as the green ogre maintained a third place with a healthy 26.7 million dollars in its weekend sales. The Dreamworks animated film has so far grossed 254.6 million dollars in North America, and its overseas release is rolling out in coming weeks.

The Spiderman flick slipped to No. 5 this weekend with some 7.5 million dollars after five weeks in release. Sony Pictures would be satisfied with the superhero film's 318 million dollars in domestic sales and 844 million dollars worldwide.

Source: Xinhua