Life as We Know It, starring Heigl and Josh Duhamel as an unlikely couple forced to come together when their best friends are killed in an accident, leaving behind their infant daughter for them to raise, took in $14.6 million, a respectable showing.
Disney's Secretariat, starring Diane Lane and John Malkovich, about the greatest race horse who ever lived, made $12.6 million.
Newly knighted Superman director Zack Snyder's beautiful animated offering, Legend of the Guardians: The Owls of Ga'Hoole, slipped to fourth place with $7 million as the film continued to underperform, earning just less than $40 million in the three weeks since its release.
Rounding out the top five, Wes Craven's early Halloween frightfest, My Soul to Take, brought in $6.9 million -- and surely inspired a slew of nightmares.
Ben Affleck's The Town stayed strong at number six, Wall Street: Money Never Sleeps slipped to number seven, the hilarious high school comedy Easy A came in at number eight, Case 39, Renee Zellweger's largely ignored latest project was number nine and You Again earned the tenth spot.
1. The Social Network, $15,500,000
2. Life as We Know It, $14,635,000
3. Secretariat, $12,600,000
4. Legend of the Guardians: The Owls of Ga'Hoole, $7,015,000
5. My Soul to Take, $6,919,000
6. The Town, $6,350,000
7. Wall Street: Money Never Sleeps, $4,625,000
8. Easy A, $4,200,000
9. Case 39, $2,630,000
10. You Again, $2,474,000
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