I used to think of fruit and veg as "free" in terms of calories, I thought you could just eat as much of them as you wanted. Thats not true! A "large" apple is 132 calories, a "large" orange 86, a cup of cherries is 95, and a "medium" banana is 94. Meanwhile, if you like exotic fruits (like I do, yum!), a "medium" mango will set you back 203 calories!!!!
I eat loads of fruit, 500 grams of blueberries (280 calories) will disappear while I type emails, and I generally get about 5-6 servings of fruit a day, BUT, I make sure I pay attention to the calories because they are far from "free"!
My doctor, by the way, says I eat too much fruit and that it will damage my liver in the long-term, but I've cut way back on my alcohol consumption recently, so I think my liver can handle a few extra blueberries.