The final frame of 2007 saw moviegoers rush out and catch up on holdovers as last weekend's biggest hits remained atop the charts. The Disney adventure sequel National Treasure: Book of Secrets held steady at number one for the second straight time grossing an estimated $35.6M. Dropping a reasonable 20%, the PG-rated actioner saw its ten-day total soar to $124M. Nicolas Cage's franchise pic averaged a terrific $9,299 from 3,832 playdates. Book of Secrets has already broken into the Top 20 chart of this year's blockbusters and stands a chance of reaching the Top 10. That would be fitting since five of the six biggest hits of 2007 were sequels.

Another PG-rated film catering to moviegoers of all ages followed in second. Fox's family comedy sensation Alvin and the Chipmunks saw its weekend gross climb up 7% from last weekend to an estimated $30M which boosted the cume to a stunning $142.4M in only 17 days. If estimates hold, Alvin will become the first film in a year and a half to gross $30M or more in its third weekend. Pirates of the Caribbean: Dead Man's Chest was the last smash to do it back in July 2006. Alvin already sits at number 13 among all blockbusters from 2007 and is Fox's second-biggest hit of the year after the $183.1M of The Simpsons Movie.

Will Smith's megahit I Am Legend collected an estimated $27.5M in its third weekend, off 18%, pushing its sensational total to $194.6M after 17 days. The Warner Bros. blockbuster is just a couple of days away from becoming the ninth blockbuster of 2007 to cross the $200M mark edging out 2005's eight to set a new industry record. National Treasure and Alvin could both still join the club by the end of their runs. Together the three end-of-year behemoths have grossed a combined $461M and counting giving the year an explosive finish.

Leading all films for mature adults was Charlie Wilson's War with an estimated $11.8M which was up a healthy 22% from last weekend's opening frame. With Christmas over and grown-ups having more available time, the Tom Hanks-Julia Roberts pic upped its cume to a decent $34.5M which was almost identical to the $35.1M that the studio saw exactly a year ago from its CIA drama The Good Shepherd in its first ten days which also included the yuletide holiday week. That political saga appealed to much the same audience and went on to gross $59.9M domestically. War cost $75M to produce.

Indie darling Juno continued to overwhelm at the box office leaping up into the number five slot with an estimated $10.3M despite playing in only 998 theaters. Every film above it on the charts is in at least 2,500 sites. The teen pregnancy tale averaged a still-superb $10,321 in its fourth frame and pushed the sum up to a remarkable $25.7M. Juno is already outperforming Fox Searchlight's dysfunctional family comedy hit from last year Little Miss Sunshine which in its fourth frame grossed $5.6M from its expansion into 691 locations for a $8,120 average and $12.7M total. With buzz snowballing, kudos attention becoming more focused, and a long awards season still ahead of it, Juno looks to challenge Sunshine and 2004's Sideways to become the distributor's highest-grossing film ever. Those Oscar-winning comedies banked $59.9M and $71.5M, respectively.