One of the coolest and most bad ass French brands that I adore is Zadig et Voltaire. It is always one of the shops that I have to go to when I am in Paris. I was so excited when I moved to London because there are actually several Z et V shops in town and I get to pop in all the time. What is even cooler is that they do a line for kids/baby so even your little ones can look like a chic little French rocker.
I especially love all the statement Z et V tops: finely knit sweaters, luxurious cashmere, and super soft cotton tshirts. There is always something so cool on their tops such as their signature skull, shimmery butterfly, guitar or catchy word/phrase. All of this is done in such a chic and stylish manner where the pieces are young but not middle school young. I tend to wear a pretty monochromatic wardrobe (grey, black, white, navy) and their signature collection is done in the neutrals I love but with an edge that give it that je ne sais quoi!
There are even Z et V outlets! A sale shop just opened up on Kings Road and I got to go the outlet outside of Euro Disney too.