Errands may lead you to a tee and jeans, but Eva Mendes proved that the right dress can be just as easy. In fact, her flowy maxi style is even easier. It’s no wonder rich moms are rocking the look nonstop. At only $20, so are we! A few days ago, Mendes strolled around Santa Monica wearing a loose brown dress, cushiony flip-flops and a sweater tied around her waist. She finished the outfit with a bucket hat and two roomy totes (for all of her goodies, we assume). Casual, yes, but this dress style made her relaxed getup appear polished and intentional. See it!...