Dakota Fanning and Elle Fanning were together last night to touch down at LAX. They're home again in California following a very atypical Monday night spent out in NYC — the girls dressed up to hit the red carpet at the Costume Institute Gala. Dakota was young and having fun in a Valentino gown covered with flowers, while Elle kept things simple in a black and cream number from the same designer. The Fanning girls seem to have a taste for fashion, and they support their favorite designers from coast to coast. In addition to this week's big Met Ball, they also supported Mary-Kate and Ashley Olsen's TEXTILE Elizbabeth & James line at a recent party in NYC. Dakota may soon have to forgo the LA-based bashes, though, depending on where she decides to go to college in the Fall.