Need Built in Email Sign Up Form to go to Aweber List by Lindsey Apuzzo

Site: http://elle-k-boutique.myshopify.com/

PW: eak1213

Would like the built in newsletter sign up form at the bottom of the page to go to a list in my Aweber account. 

Can anyone help me out with this? My email is info@elleandk.com

Thanks,

Lindsey