A sleek striped top has such a distinctly Parisian vibe to it, but it also makes the perfect top for pattern mixing.  I love the casual feel it lends to a neon tweed skirt, especially with slip on sneakers.

{American Eagle Aerie top; J. Crew skirt (similar from Forever 21 or Asos); H&M sneakers (similar from DSW); Ray Ban sunglasses; Catbird rings}