It looks like black and white vertical stripes are rocking spring 2013. They are now being sold in stores. Id love to own a vertical stripes pants and a dress someday. I feel that they are pretty classic. The pictures here are from the Marc Jacobs collection of Spring 2013. Garments like these have been sold in Mango and ZARA. http://www.forever21.com finally launched these pieces. Vertical stripes shorts, leggings and pants these days are the most convenient loud bottoms to match with anything.
Squares or grids has also been hot this spring. Forever 21 is already selling checks and stripes blazers and pants. The shorts are looking good too. Striped shoes will also go with any outfit. Check out the picture below from Marc Jacobs. The Spring Summer 2013 fashion show for Moschino even had a lot of squares and vertical stripes: http://www.moschino.com/