"Couples Retreat" stars Jason Bateman and Kristen Bell. (Universal Pictures/Image still)

The relationship comedy "Couples Retreat" booked the top berth at the box office with a $34.3 million debut, while the low-budget horror sensation "Paranormal Activity" broke into the top-10 with $7.9 million.

"Paranormal Activity" finished at No. 4 in its first weekend of daylong release after two weeks of midnight screenings. The movie's weekend haul was $800,000 higher than distributor Paramount had estimated Sunday.

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

1. "Couples Retreat," Universal, $34,286,740, 3,000 locations, $11,429 average, $34,286,740, one week.

2. "Zombieland," Sony, $14,802,431, 3,038 locations, $4,872 average, $47,603,512, two weeks.

3. "Cloudy With a Chance of Meatballs," Sony, $11,527,480, 2,992 locations, $3,853 average, $95,778,436, four weeks.

4. "Paranormal Activity," Paramount, $7,900,695, 160 locations, $49,379 average, $9,113,936, three weeks.

5. "Toy Story" and "Toy Story 2" in 3-D," Disney, $7,766,643, 1,752 locations, $4,433 average, $22,768,991, two weeks.

6. "Surrogates," Disney, $4,268,314, 2,992 locations, $1,427 average, $32,725,781, three weeks.

7. "The Invention of Lying," Warner Bros., $3,339,263, 1,743 locations, $1,916 average, $12,295,868, two weeks.

8. "Whip It," Fox Searchlight, $2,827,512, 1,738 locations, $1,627 average, $8,793,570, two weeks.

9. "Capitalism: A Love Story," Overture, $2,630,292, 995 locations, $2,644 average, $9,025,483, three weeks.

10. "Fame," MGM, $2,543,067, 3,110 locations, $818 average, $20,028,829, three weeks.

11. "The Informant!", Warner Bros., $2,204,286, 2,202 locations, $1,001 average, $29,847,434, four weeks.

12. "Tyler Perry's I Can Do Bad All By Myself," Lionsgate, $1,511,904, 1,313 locations, $1,151 average, $50,383,561, five weeks.

13. "Love Happens," Universal, $1,467,030, 1,894 locations, $775 average, $21,252,445, four weeks.

14. "Good Hair," Roadside Attractions, $1,043,732, 186 locations, $5,611 average, $1,043,732, one week.

15. "Inglourious Basterds," Weinstein Co., $848,970, 968 locations, $877 average, $118,297,669, eight weeks.

16. "9," Focus, $829,650, 1,216 locations, $682 average, $30,659,622, five weeks.

17. "Pandorum," Overture, $822,415, 1,479 locations, $556 average, $9,517,801, three weeks.

18. "G.I. Joe: The Rise of Cobra," Paramount, $687,865, 609 locations, $1,129 average, $148,969,502, 10 weeks.

19. "All About Steve," Fox, $659,472, 1,200 locations, $550 average, $32,742,037, six weeks.

20. "Bright Star," Apparition, $624,834, 380 locations, $1,644 average, $2,846,921, four weeks.

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