Using mom's credit card?

I reallly want this $5 bracelet/band off a website and it's a total of $8 if you include the shipping and I'm just wondering if I use my mom's credit card without her permission, will she notice? She can see if she looks online at her purchases and stuff, right? It's not like I'm buying a 60" TV for $2000 or anything, so yeah.. What do you think?