National Treasure: Book of Secrets held its spot atop the box office rankings, raking in $35.6 million over the weekend. Family flick Alvin and the Chipmunks continued its surprisingly strong run, grabbing second place with a $30 million gross. Following close behind was Will Smith's juggernaut I Am Legend, which took in a healthy $27.5 million. Rounding out the top five were Charlie Wilson's War and Juno, which took in $11.8 million and $10.3 million, respectively.