Some songs are harder than others to forget. Why is that? A simple phrase, melody, or even dance can make a song so catchy, you can even hear it in your sleep.From Call Me Maybe, to Gangnam Style, to 小苹果, it seems not even language can stop us from getting caught up in the music - but why?Together, let’s take a look at some of the biggest songs from around the world and see just why we can’t get them out of our heads.有些歌曲比其他歌曲难忘。 这是为什么？ 一个简单的短语、旋律甚至是舞蹈都可以使一首歌变得如此动听，甚至在梦中还会听到。从Call Me Maybe，到江南Style，再到小苹果，似乎没有语言能够阻挡我们被音乐所吸引-但是为什么呢？让我们一起来看看世界各地的一些最流行的歌曲，看看到底为什么我们不能摆脱它们！