Getting Fit and Fat Burners

Hello, I'm new here...I eat clean most of the time, I work out 3 times a week (I box) and drink water. This year I lost 35 pounds but I still have about 10 more pounds I want to lose to reach my goal. I'm getting married in 2016 and of course, I want to be in the best shape of my life. I have a question I was hoping someone could help me with some tips/recommendations. I've recently started learning about fat burners but have never used one. What's an effective organic and stimulant free fat burner?