LOS ANGELES (AP) - "Iron Man 3" maintained its box office mettle with $72.5 million in its second weekend, while "The Great Gatsby" proved a strong runner-up with a $50.1 million debut.

The top 20 movies at U.S. and Canadian theaters Friday through Sunday, followed by distribution studio, gross, number of theater locations, average receipts per location, total gross and number of weeks in release, as compiled Monday by Hollywood.com, are:

1. "Iron Man 3," Disney, $72,525,615, 4,253 locations, $17,053 average, $284,946,699, two weeks.

2. "The Great Gatsby," Warner Bros., $50,085,184, 3,535 locations, $14,168 average, $50,085,184, one week.

3. "Pain & Gain," Paramount, $5,001,029, 3,303 locations, $1,514 average, $41,609,229, three weeks.

4. "Peeples," Lionsgate, $4,611,534, 2,041 locations, $2,259 average, $4,611,534, one week.

5. "42," Warner Bros., $4,588,209, 2,930 locations, $1,566 average, $84,670,088, five weeks.

6. "Oblivion," Universal, $4,114,665, 2,770 locations, $1,485 average, $81,906,280, four weeks.

7. "The Croods," Fox, $3,609,028, 2,650 locations, $1,362 average, $173,224,505, eight weeks.

8. "Mud," Roadside Attractions, $2,535,642, 854 locations, $2,969 average, $8,555,621, three weeks.

9. "The Big Wedding," Lionsgate, $2,490,362, 2,298 locations, $1,084 average, $18,278,053, three weeks.

10. "Oz the Great and Powerful," Disney, $1,078,233, 774 locations, $1,393 average, $230,260,553, 10 weeks.

11. "Olympus Has Fallen," FilmDistrict, $741,518, 836 locations, $887 average, $96,619,142, eight weeks.

12. "The Place Beyond the Pines," Focus, $705,333, 669 locations, $1,054 average, $20,008,869, seven weeks.

13. "Scary Movie 5," Weinstein Co., $675,942, 1,007 locations, $671 average, $30,613,972, five weeks.

14. "Jurassic Park" in 3-D, Universal, $633,935, 653 locations, $971 average, $44,752,845, six weeks.

15. "G.I. Joe: Retaliation," Paramount, $607,403, 750 locations, $810 average, $119,764,294, seven weeks.

16. "The Company You Keep," Sony Pictures Classics, $400,501, 394 locations, $1,017 average, $4,130,751, six weeks.

17. "Evil Dead," Sony, $291,266, 443 locations, $657 average, $53,756,774, six weeks.

18. "Jack the Giant Slayer," Warner Bros., $247,325, 281 locations, $880 average, $64,482,913, 11 weeks.

19. "Identity Thief," Universal, $192,585, 279 locations, $690 average, $133,714,590, 14 weeks.

20. "Tyler Perry's Temptation," Lionsgate, $186,995, 278 locations, $673 average, $51,699,494, seven weeks.

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Universal and Focus are owned by NBC Universal, a unit of Comcast Corp.; Sony, Columbia, Sony Screen Gems and Sony Pictures Classics are units of Sony Corp.; Paramount is owned by Viacom Inc.; Disney, Pixar and Marvel are owned by The Walt Disney Co.; Miramax is owned by Filmyard Holdings LLC; 20th Century Fox and Fox Searchlight are owned by News Corp.; Warner Bros. and New Line are units of Time Warner Inc.; MGM is owned by a group of former creditors including Highland Capital, Anchorage Advisors and Carl Icahn; Lionsgate is owned by Lions Gate Entertainment Corp.; IFC is owned by AMC Networks Inc.; Rogue is owned by Relativity Media LLC.

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