'Avatar' earns $13.3 million on Friday

Epic poised to become top-grossing movie released in 2009

Continuing its blue-chip reign atop the boxoffice, Fox's "Avatar" easily held onto the No. 1 spot Friday as it entered its fourth weekend.

James Cameron's 3D sci-fi epic picked up an estimated $13.3 million at the North American boxoffice for the day, and on Saturday it should cruise past the $402.1 million domestic gross of summer's "Transformers: Revenge of the Fallen" to become the top-grossing movie released during 2009.

Of the weekend's three new wide releases, Lionsgate's futuristic vampire tale "Daybreakers" showed the most bite. The work of filmmakers Michael and Peter Spierig, the R-rated movie, starring Ethan Hawke, bowed in second place as it collected $5.9 million in 2,523 theaters.

Two Christmas holdovers, Warners' "Sherlock Holmes" and Fox's "Alvin and the Chipmunks: The Squeakquel," held on to third and fourth place, respectively. "Sherlock" took in an additional $5.2 million, while "Alvin" grabbed another $3.4 million.

Universal's PG-rated romantic comedy "Leap Year," starring Amy Adams, debuted in fifth place. The Anand Tucker-directed feature, set in Ireland, took in $3.28 million in 2,511 theaters.

It narrowly outgrossed Uni's "It's Complicated," the senior-oriented rom-com, which pulled in $3.24 million.

The Weinstein Co.'s R-rated comedy "Youth in Revolt," starring Michael Cera, had to settle for a seventh-place bow. Opening in 1,873 theaters, the movie, directed by Miguel Arteta, turned up just $2.7 million.