you will be surprised the difference a good brow shape can do for your entire face. do not follow what your friend is doing to the copy what the celebrities are doing. we are all different and we have different shapes, density and colour to our brows.
Follow your natural shape. that is a good starting point. however sometimes having a starting point is good but we need more. so below i have pasted a list of different brow shapes you should have which will compliment your face shape and why.
do not go crazy and take off half of your brows. the above picture is a guide. but you can see why these brows compliment the face shape. they all open up the eyes are. this makes the features look more welcoming and perfectly frames the face.