《交换快乐》是由胡杏儿、李思捷演唱的一首歌曲，由叶肇中谱曲，林日曦填词。
麦当劳公司允许父母把快乐套餐中的沙拉交换牛奶或橙汁，同样提供把含有糖精或炸鸡块的苹果条交换薯条或汉堡等活动。
McDonald's allows parents to swap milk or juice for soda in its Happy Meals. It also offers sliced apples with caramel sauce and chicken nuggets as alternatives to French fries and hamburgers.
这一笑，让我用我的青春，我的快乐与之交换。
这么多难忘的瞬间，这么多神情的交换，这么多快乐的分享。
So many unforgettable moments, so many exchanges of expressions, so many shares of happiness.
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