How can I tone my ?

Ok, So I just had my 3rd child 8months ago... I have been working out and have lost most of the baby weight. I am 5ft, and 105lbs... I never wanted to lose weight just my belly but I have lost tons by doing Cardio. The problem is that I now have lost my cute and just kinda looks saggy and not so cute and perky... Is it gone forever or is there anything I can do to bring it back to life lol