As far as zombie apocalyses go, "Warm Bodies" has proven to be a surprisingly pleasant one, as the new undead romcom easily beat out the competition this week to take the top spot at the box office, earning an estimated $20 million over its opening weekend.

That's the good news. The bad news? Everything else, as the rest of the box office was pretty much in the tank, due in no small part to the failure of the weekend's other major new release, Sylvester Stallone's "Bullet to the Head." That effort proved to be a non-starter, racking up a dismal $4.5 million and further delaying the inevitable career resurgence of Christian Slater.

Of course, every dark cloud has a silver lining, and in this case its the performance of "Silver Linings Playbook," which stayed strong with $8.1 million for third place. The award season favorite was joined by fellow critical darlings "Zero Dark Thirty," "Django Unchained," "Les Miserables" and "Lincoln" in the top ten, each of which has taken advantage of January's exceptionally poor lineup of new films in putting together long and impressive box office runs.

That could finally change next weekend, as the Melissa McCarthy/Jason Bateman buddy comedy "Identity Thief" and Steven Soderbergh's thriller "Side Effects" are both set to debut. But for now, the box office looks pretty dead.

And that means it's feeding time for zombies.

Here's a look at the full box office top ten, courtesy of Hollywood.com:

1. "Warm Bodies" - $20m (our review)

2. "Hansel and Gretel: Witch Hunters" - $9.2m

3. "Silver Linings Playbook" - $8.1m (our review)

4. "Mama" - $6.7m (our review)

5. "Zero Dark Thirty" - $5.3m (our review)

6. "Bullet to the Head" - $4.5m (our review)

7. "Parker" - $3.2m (our review)

8. "Django Unchained" - $3m (our review)

9. "Les Misérables" - $2.4m (our review)

10. "Lincoln" - $2.4m (our review)