Go to the All You freebie page here and then click on the link to be redirected to the entry form. Enter your information and click enter. I got an error page, but at least was able to enter my information and hit submit. Anyway, use at your own risk (of not getting a sample). All You has not found a way to avoid the error as posts on their Facebook page indicate.
If you have prior to today requested the sample, you will not be able to request it again! One time use only for this offer. If you get an initial error for clicking on the link, try deleting your cookies and then the entry form should load.