The Olsen twins, those adorable millionaire munchkins hit the quarter century mark today. With their booming fashion empire -- The Row, a favorite among the sophisticated fashion crowd, and Elizabeth and James, casual clothes for the cool kid set -- the girls have finally become serious style icons.

But we at StyleList are split on which sister has the better sartorial sense. Check out the image gallery above and lets us know -- are you Team Ashley or Team M-K?

And don't miss the girls' looks from the 2011 CFDA Fashion Awards: