The best execise to lose belly fat is?

I have changed my eating habits,I eat healthy foods now at the right time and nothing after 7pm, I’m on the treadmill an hour every day and I am having a problem losing my belly fat. There has got to be a way besides pills to lose belly fat. Can someone please tell me what are the best execises to do for the stomach.
Excluding Samuel P. I would like to thank all of you guys for your helpful answers.