Hollywood ended its summer of discontent at the movies with... a cheer. Bring It On the cheerleading flick starring Kirsten Dunst demonstrated more pep at the box office over the four-day Labor Day weekend, grossing an estimated $14.5 million to remain No. 1. The Cell came in second with $9.1 million, followed by Space Cowboys ($8.3 million) and The Art of War ($7.6 million). Newcomer Highlander: Endgame debuted in fifth, taking in $6.4 million, while the Amanda Peet comedy Whipped wasn't able to overcome the worst reviews since Battlefield Earth; it opened at No. 15 with $2.7 million. During its first weekend in wide release, the British comedy Saving Grace took in $2.9 million, good enough for 13th place. Total ticket sales this summer were down 5.2 percent from last year, when Star Wars: Episode I The Phantom Menace and The Sixth Sense dominated the charts.