Okay, if you can't make it to Old Navy on Saturday (or don't want to risk the lines and not getting any flip flops) Payless has a great deal right now.
Buy One Get One Free Flip Flops!
Many of their flip flops are $5.99.
Then, use coupon code 27662 to take $2 off of your order.
You'll get two pairs for $4 - thus, $2 each.
If you have them shipped to the store, you get FREE shipping.
Deal is only good until July 5.