Foundation Brush (essence of beauty) - I LOVE this brush! It's one of my favorites. Before I found out about this brush I was using a sponge to apply my creamy/liquid foundations. Using this brush not only gives you a better make-up application, but it also saves you product in the long-run. The sponges that come with most foundations tend to soak up a lot of the product and cause you to run out faster. I would definitely recommend using some type of foundation brush to apply your foundations.
That is all for my current brush collection. I hope that you found this post to be helpful! Please post if you have any other questions regarding make-up brushes. You can see that I don't have that many brushes. I don't think that you need 100 make-up brushes to apply make-up well.