Aventura
            
Aventura Mall
http://www.aventuramall.com

Miami Beach

Lincoln Road is my favorite spot to check out: 
http://www.shoponmiamibeach.com/

Coconut Grove

Cocowalk
http://www.cocowalk.net

Coral Gables

Village of Merrick Park
http://www.villageofmerrickpark.com

Shops on Miracle Mile http://www.shopcoralgables.com/directory.cfmiraclemile

South Miami

Dadeland Mall
http://dadelandmall.com 

Shops at Sunset Place
http://www.simon.com/mall/default.aspx?ID=143

Outlet Mall  
      
Sawgrass Mall
(one of the largest in the world)
http://www.sawgrassmillsmall.com