Jennifer Lawrence is a brunette again. After spending the majority of award season with blond strands, ranging from deep caramel-hued lowlights to honey-toned highlights, the Oscar-winning actress is back to dark brown. Jennifer has tried a variety of hair colors over the past few years, including red, rich espresso, and just about every shade in between. Jennifer isn't the only star to darken up her strands this week, though. Britney Spearsdebuted a deep chestnut-brown shade at Elton John's Oscars viewing party last night. As for the reason behind Jennifer's new look, it has a little something to do with her shooting schedule for the upcoming The Hunger Games: Catching Fire. Anything for one's craft, no?