The ComingSoon.net Box Office Report has been updated with studio estimates for the weekend,. Be sure to check back on Monday for final figures based on actual box office. The last weekend of the year was even busier than normal between the five new movies from last week and three new movies added on Tuesday, but while Aliens vs. Predator – Requiem (20th Century Fox) was expected to destroy all competition, that’s not quite what happened, as it could barely hold its own against a number of returning movies including a little underrated indie that exploded over the holidays. Jerry Bruckheimer’s National Treasure: Book of Secrets (Disney) remained on top for a second weekend with $35.6 million, while Alvin and the Chipmunks (Fox) overtook Will Smith’s sci-fi thriller I Am Legend (Warner Bros.) to take second place with $30 million and a cumulative gross of $142.4 million. After opening on Christmas Day with $9.5 million in just over 2,500 theaters, Aliens vs. Predator – Requiem (20th Century Fox) quickly tanked, making just $10 million over the weekend and $26.8 million over the six days. Fox Searchlight’s indie comedy Juno beat it into the Top 5 by a mere quarter of a million dollars, grossing $10.3 million in its first wide release into less than a thousand theaters.