MONDAY AM, 4TH UPDATE: What a very slow Labor Day weekend at the North American box office as Summer 2011 crawls to a close. DreamWorks/Disney’s The Help is an easy No. 1 again after 4.5 weeks in release. Focus Features’ adult-targeted The Debt came in No. 2 despite playing in far less theaters than its competition. Not much good to say about the other new offerings which audiences decided weren’t worth watching. The Debt earned a ‘B’ CinemaScore, Relativity’s Shark Night 3D a ‘C’, and bringing up the rear was Dimension/The Weinstein Co’s Apollo 18 with only a ‘D’ indicating just how disappointed audiences were with this pic. This is Weinstein’s 3rd summer underperformer in a row. Also this weekend, Disney returned Cars 2 for $1.6M through Labor Day bringing its worldwide total to $540.8M, and Lionsgate sneaked Warrior:

1. The Help (DreamWorks/Disney) Week 4.5 [2,843 Theaters]
Friday $3.6M, Saturday $5.3M, Sunday $5.5M
3-Day Weekend $14.6M, 4-Day Holiday $19M, Cume $123.3M

2. The Debt (Focus Features) NEW (Wed opening) [1,826 Theaters]
Friday $2.6M, Saturday $3.8M, Sunday $3.6M
3-Day Weekend $9.9M, 4-Day Holiday $12.5M, Cume $14.4M

3. Apollo 18 (Dimension/The Weinstein Co) NEW [3,328 Theaters]
Friday $2.8M, Saturday $3M, Sunday $2.8M
3-Day Weekend $8.7M, 4-Day Holiday $10.7M

4. Shark Night 3D (Relativity) NEW [2,806 Theaters]
Friday $2.7M, Saturday $3M, Sunday $2.6M
3-Day Weekend $8.3M, 4-Day Holiday $10.3M

5. Rise Of The Planet Of The Apes (Fox) Week 5 [3,193 Theaters]
Friday $1.8M, Saturday $2.9M, Sunday $3.1M
3-Day Weekend $7.9M, 4-Day Holiday $10.2M, Cume $162.4M

6. Colombiana (Sony) Week 2 [2,614 Theaters]
Friday $1.9M, Saturday $2.7M, Sunday $2.7M
3-Day Weekend $7.4M (-28%), 4-Day Holiday $9.4M, Cume $23.9M

7. Our Idiot Brother (The Weinstein Co) Week 2 [2,555 Theaters]
Friday $1.4M, Saturday $1.9M, Sunday $2.1M
3-Day Weekend $5.4M (-22%), 4-Day Holiday $7M, Cume $17.2M

8. Spy Kids 4D – 3D (Dimension/Weinstein Co) Week 3 [3,007 Theaters]
Friday $1M, Saturday $1.8M, Sunday $1.8M
3-Day Weekend $4.8M, 4-Day Holiday $6.6M, Cume $31M

9. Don’t Be Afraid Of The Dark (FilmDistrict) Week 2 [2,780 Theaters]
Friday $1.4M, Saturday $1.9M, Sunday $1.7M
3-Day Weekend $5.1M (-40%), 4-Day Holiday $6.1M, Cume $17.5M

10. The Smurfs (Sony) Week 6 [2,706 Theaters]
Friday $875K, Saturday $1.5M, Sunday $1.6M
3-Day Weekend $4.1M, 4-Day Holiday $5.6M, Cume $133.5M
International Cume $295.8 million, Worldwide Total $427.8M