Sienna Miller looks cute in her short, Pixie haircut on the left. And it is quite stylish where short haircuts are concerned. No maintenance other than keeping regular hair cutting appointments. Yet, Sienna decided she wanted something more. Adding hair extensions will take you from short to long in just a few hours. Expertly applied to your existing hair near the scalp, extensions are worked in to look very natural which can be shampooed and styled as if they were growing out of your scalp. With expert being the key word here, they do need to be done correctly in order to enjoy them their maximum life of wear of two to three months.