With its popular lead actors and well-executed marketing campaign, "21 Jump Street" jumped unto the first place at the box office this weekend at 35 million US dollars. Starred by Jonah Hill and Channing Tatum, the undercover cop comedy was the second biggest opening ever for an R-rated comedy outside of the prime summer season. 　　"Dr. Seuss' The Lorax" fell 41 percent to an estimated 22.8 million US dollars in its third weekend. So far, the animated hit has earned 158.4 million and it looks like it will wind up finishing with over 200 million. 　　Coming off its disappointing 30.2 million US dollars opening last weekend, "John Carter" plummeted 55 percent to an estimated 13.5 million at No. 3. The mega-budgeted film has made 53.2 million so far, and has a chance of reaching 100 million mark in the following weeks. 　　Party comedy "Project X" fell 64 percent to just over 4 million US dollars at No. 4. Through 10 days, the movie has made 48.1 million, four times of its production cost. 　　No. 5 went to Eddie Murphy's "A Thousand Words," which raked in 3.75 million US dollars. No. 6 through No. 8 were past weeks' holdovers, including the military actioner "Act of Valor" at 3.7 million, Safe House at 2.8 million and Journey 2 Journey 2:The Mysterious Island at 2.5 million. 　　The only new-release that enters the top ten chart was Will Ferrell's Spanish-language action comedy "Casa De Mi Padre," which debuted in ninth place with an estimated 2.2 million despite a limited release at only 382 locations. 　　Reese Witherspoon's romantic comedy "This Means War" raked in 2.1 million US dollars, bringing the total ticket sale to 50.5 million US dollars.