Asking what movie kicked off President's Day weekend by winning the Friday night box office is like the start of a bad Abbott and Costello routine: It's "Unknown."

[article id="1658343"]Despite middling reviews[/article], the Liam Neeson starrer about a man who awakens after a car accident to discover the life he thought he had has been taken away, topped all comers with $6.7 million on Friday from 3,043 screens.

Expected to end at somewhere over $25 million for the four-day weekend, "Unknown" continues Neeson's recent domination of the February box office. [article id="1658364"] The secretly badass[/article] star wowed audiences two years ago in "Taken," which, after opening in February 2008, ended its run with $226 million worldwide.

"I Am Number Four," meanwhile, will have to settle for being number two. On Friday, [article id="1658264"]the teen-targeted alien picture[/article] finished in second place with $6.2 million. The latest from director D.J. Caruso, and star Alex Pettyfer, "I Am Number Four" could still win the weekend with a strong Saturday bounce.

Last week's winner, the Adam Sandler and Jennifer Aniston starring "Just Go With It," came in third place with $5.2 million.

Rounding out the top five, new release "Big Mommas: Like Father, Like Son" and holdover "Gnomeo and Juliet" earned $4.8 million and $4.3 million, respectively.

Which means America may have finally found a cure for [article id="1657775"]Bieber Fever[/article], as the doe-eyed one's 3-D concert pic, "Justin Bieber: Never Say Never," toppled all the way from second to sixth place, earning just $3.8 million on Friday.

Among Oscar hopefuls, "The King's Speech" (seventh place) continued its impressive run. The presumptive favorite at the Academy Awards will pass $100 million domestically this weekend.

For breaking news, celebrity columns, humor and more -- updated around the clock -- visit MTVMoviesBlog.com.