The Titanic has slowly started to take on water.

Over the holiday weekend, Avatar added another $54.6 million to its domestic total ($505 million), bringing it that much closer to The Dark Knight‘s second-place spot. The Golden Globe-winning film, which now stands at approximately $1.6 billion internationally ($200 million shy of Titanic), also became the first film since The Sixth Sense to win five straight weeks in a row.

Meanwhile, The Book of Eli - starring Denzel Washington and Gary Oldman - put up good numbers despite finishing in second place. Allen and Albert Hughes’ first movie since 2001’s From Hell raked in an impressive $38.4 million, giving Washington his second best debut ever. (American Gangster took in $43.6 million in 2007.) The receipts also made the film Warner Bros.’ best January opener to date.

1. Avatar, 20th Century Fox, $54,401,446 (avg. $16,561)
2. The Book of Eli, Warner Bros., $38,437,553 (avg. $12,355)
3. The Lovely Bones, Paramount, $19,910,348 (avg. $7768)
4. Alvin and the Chipmunks: The Squeakquel, 20th Century Fox, $15,305,808 (avg. $4644)
5. The Spy Next Door, Lionsgate, $12,877,043 (avg. $4404)
6. Sherlock Holmes, Warner Bros., $12,033,507 (avg. $3792)
7. It’s Complicated, Universal, $9,622,810 (avg. $3604)
8. Leap Year, Universal, $7,071,470 (avg. $2815)
9. The Blind Side, Warner Bros., $6,972,350 (avg. $2895)
10. Up in the Air, Paramount, $6,530,101 (avg. $3099)

(You can review last week’s numbers here.)