You can get a $20 Old Navy voucher for only $10 on today Groupon. It is a limit of 1 per person, but you may buy 1 additional as a gift. It is valid thru Jan 28 and is good at any Old Navy location in the U.S. It may take up to 24 hours for your voucher to show up in your account.
Note: The link above is my affiliate link and it is the only way you can get to the deal, I can’t find it by searching through cities.
definitely a great deal!