The Buick LeSabre is America's best-selling full-size car in and has been for the past 10 years.For 2003, Buick is celebrating this market dominance with a special edition of the LeSabre called (what else?) the Celebration Edition.Distinguished by body-colored trim and a two-tone leather interior, the Celebration Edition comes loaded with luxury and safety features. But for car buyers with traditional tastes, any LeSabre is cause for celebration.LeSabre offers a big, roomy interior, a comfortable ride, a big trunk, and it's packed with safety features.In short, the LeSabre brings all the traditional Buick virtues into a new era of fuel-conscious practicality.