Very thin but major muffin tops!?!

Wear clothes that fit you. Whatever size you're wearing now is too small.

P90x without a doubt, i have been doing it for over 400 days straight now.It is the hardest most intense workout you will ever experience and it's all done in your own home. I have a video on youtube of my results. just take a sec and watch it and i bet you will be motivated after it. i can help guide you through your workouts and answer any questions you have. I'm going to school for kinesiological sciences so this is all about what i am learning.

http://www.youtube.com/watch?v=2TjRka3tG…

Situps and cardio will help, And a good diet! And maybe changing your outfits depending on how big they are. But most girls try wearing clothes to small for them which will give them that effect. so make sure your pants are fitting right.
Some things that will help as far as food goes is less sugar, and red meats. Not that you cant have them, just make sure its small amounts and not everyday.

I kinda have a similar issue with my hips... its makes me look fatter than I m... perhaps u should change ur wardrobe... buy pants that fit better... and change the type of jeans u wear