“Superman” easily kept the top spot at the box office in its second weekend of release, grossing $57.2 million to lead all films in North America, according to industry estimates released Sunday.

"Superman" has topped the North American box office again, earning $57.3 million in receipts in its second weekend, BoxOfficeMojo.com announced Sunday.

Warner Bros. Pictures’ “Superman” flew past the competition for the second straight week, grossing an estimated $57.25 ...

“ Superman ” continues to rule the worldwide box office, powering to $406 million after two weekends of release.