《魂断蓝桥》主题曲《友谊地久天长》的英文版完整歌词如下：

```

Should auld acquaintance be forgot, and never brought to mind?

Should auld acquaintance be forgot, for the sake of auld lang syne.

If you ever change your mind, but I living, living me behind,

Oh bring it to me, bring me your sweet loving, bring it home to me.

For auld lang syne my dear, for auld lang syne,

We'll take a cup of kindness yet for the sake of auld lang syne.

```

这首歌是苏格兰民歌，也是电影《魂断蓝桥》的主题曲，由Leo Sayer演唱。歌词中表达了一种对过去友谊的怀念和对未来的美好祝愿。