For the second week in a row, "Monsters University" in on pace to grab top honors at the box office for the weekend of June 28-30, 2013.

The prequel to Disney/Pixar's 2001 hit "Monsters, Inc." scooped up $15.2 million on Friday and looks headed to a three-day total of $51 million for its sophomore weekend.

The Melissa McCarthy- and Sandra Bullock-fronted newcomer "The Heat" opened in the second spot with a $15 million Friday and a projected $40.6 million total.

Rounding out the top five in estimated earnings are the Channing Tatum and Jamie Foxx thriller "White House Down" ($30 million) in third, Brad Pitt's "World War Z" ($31.1 million) in fourth, and "Man of Steel" ($20.5 million) in fifth.