I found this story on the msn website.
Apparently the tops of strawberries have lots of good vitamins and minerals that will help boost any treat.
now personally I have always eaten the tops of the strawberries. just makes them easier to eat. however, if the flavor isn't for you. or if the thought of eating the stem is just not appealing, then it is ok to make them up in your smoothie.
here is the original link.
http://www.msn.com/en-us/foodanddrink/restaurantsandnews/you-should-never-ever-throw-away-strawberry-tops/ar-BBD2XnN?li=BBmkt5R&ocid=spartandhp