It's been a bad time for movies in general lately, but good for scary thrillers as "The Forgotten" claimed the No. 1 box office spot with $22 million.

The overall box office was down again for the fourth straight weekend compared to the same time last year, but movies like "The Forgotten," about a mother who believes supernatural forces have erased people from her life, and the zombie (search) horror-satire "Shaun of the Dead" still debuted relatively strongly.

Critics hated "The Forgotten," but its ad campaign was considered highly effecting -- showing creepy images of people being sucked into the atmosphere while star Julianne Moore (search) questions what happened to her memory.

Meanwhile, "Resident Evil: Apocalypse" continued to play well in its third week, tying for fourth place with the new teen comedy "First Daughter," each of which earned an estimated $4 million.

"This just goes to show that horror movies -- even a spoof horror movie -- has a built in audience," said Paul Dergarabedian, president of box-office tracker Exhibitor Relations Co. (search) "They can be low cost and always get great numbers."

"Shaun of the Dead," a low-budget shocker that chronicles a slacker as he barely notices a zombie takeover, collected $3.3 million in only 607 theaters to rank No. 8. By comparison, most of its competition was far more widely available to audiences in 2,000 to 3,000 locations.

"We're just going to let it sit and percolate for another week then we're going to expand further," said Jack Foley, head of distribution for Focus Features, which released "Shaun."

The Katie Homes comedy "First Daughter," the year's second romantic fantasy about presidential offspring trying to escape the glare of public scrutiny, opened even more weakly than its predecessor, Mandy Moore's "Chasing Liberty," which debuted last January with $6 million.

The reviews for both films were scathing, and the similarities between "First Daughter" and "Chasing Liberty" likely dampened its debut, even though they were made at about the same time.

"It can hurt a movie if it's too similar to another recent film," Dergarabedian said.

Last week's top movie, "Sky Captain and the World of Tomorrow," fell to second place with $6.7 million for a total of $25.6 million in its second week, while the Bernie Mac baseball comedy "Mr. 3000" was third with $5 million and a total of $15.3 million.

In limited release, "The Motorcycle Diaries," a Robert Redford-produced accounting of communist revolutionary Che Guevara's youthful escapades across South America, opened in only three theaters but collected an average of $52,351 in each. By comparison, "The Forgotten" had an average of only $7,088 in 3,104 screens.

"The Last Shot," a Matthew Broderick comedy about a wannabe director duped into making a false movie in an FBI attempt to bust some gangsters, had a weak debut in 35 theaters, collecting only an average of $4,829 in each.

The overall box office was $60 million, down about 25 percent from the same time last year when "The Rundown" and "Under the Tuscan Sun" were the top earners. Dergarabedian noted a sinking trend at the box office over the past month, which is traditionally a slow time at theaters -- but unusually slow this time.

Estimated ticket sales for Friday through Sunday at North American theaters, according to Exhibitor Relations Co. Inc. Final figures will be released Monday.

1. "The Forgotten," $22 million.

2. "Sky Captain and the World of Tomorrow," $6.7 million.

3. "Mr. 3000," $5 million.

4. (tie) "First Daughter," $4 million.

4. (tie) "Resident Evil: Apocalypse," $4 million.

6. "Cellular," $3.7 million.

7. "Wimbledon," $3.4 million.

8. "Shaun of the Dead," $3.3 million.

9. "Without a Paddle," $2.4 million.

10. "Hero," $2.3 million.