In the calm before the Christmas storm at the box office, "Ralph Breaks the Internet" remained No. 1 for the third straight week, while the upcoming DC Comics superhero film "Aquaman" arrived with a cannonball-sized splash in Chinese theaters.
For the second week in a row, no new wide releases opened in North American theaters, allowing Disney's animated sequel to again lead domestic ticket sales with $16.1 million, according to studio estimates Sunday.
The top six films at the box office were all unchanged. Universal's "The Grinch," still a major draw in its fifth weekend, trailed in second with $15.2 million.
But the weekend's biggest...