Nicole Kidman's winning streak ( Moulin Rouge, The Others) didn't carry over to her latest flick, Birthday Girl. Her new film grossed a hardly festive $2.5 million at the box office over the weekend bad enough for an 11th place finish. Fellow newcomer Slackers didn't fare much better: The gross-out comedy debuted at No. 10 with $3 million. At the other end of the chart, Black Hawk Down was No. 1 for the third consecutive weekend. The Ridley Scott war pic grossed another $11.5 million for a $75.5 million cume. Cuba Gooding Jr.'s career-ending comedy, Snow Dogs, held the No. 2 spot with $9.9 million. Rounding out the top five: The Count of Monte Cristo, A Walk to Remember and A Beautiful Mind.