Collect 6 different golden fruits
Each world in the game has a unique type of golden fruit, making 7 types in total. There are 15 in each world to collect, with no more than one being found in any level. Collecting a golden fruit is as simple as destroying it. The golden fruit are usually inside boxes or obscured by other objects, but often are partially visible in the level to you. The types are pineapples, bananas, watermelons, mangos, apples, papayas, and strawberries. You only need to collect 1 golden fruit from 6 of the 7 types. This is not that difficult at all; just keep an eye out. If you are having trouble, see THIS link for the golden fruit locations. Thanks to AngryBirdNest.com for the videos!