Holiday travel can be a drag, but it doesn't have to be drab! Stars keep it comfortably cool while jet-setting this season. Sienna Miller looks smart in blue jeans and a cute black blazer with her hair pulled back while traveling to Mexico City this week with actor Rhys Ifans. Cameron Diaz is the epitome of casual chic dressed in a grey cashmere sweater, jeans with a skinny belt, and black cap while toting Burberry's hot, studded bag, and a Louis Vuitton carry-on on a recent trip out of Los Angeles. And if you can't beat the travel blues, take a cue from Paris Hilton and join them! Paris takes comfort to a whole other level, arriving in Shanghai on Wednesday to attend the 2007 MTV Style Gala in a prison-striped top and shockingly bright blue sweats. That's one way to make an entrance!