《泰坦尼克号》的主题曲是《我心永恒》，也被称为《我心依旧》和《爱无止境》，由席琳·迪翁演唱。这首歌的歌词如下：

```

Every night in my dreams

I see you, I feel you

That is how I know you go on

Far across the distance

And spaces between us

You have come to show you go on

Near, far, wherever you are

I believe that the heart does go on

Once more, you opened the door

And you're here in my heart

And my heart will go on and on

Love can touch us one time

And last for a lifetime

And never let go till we've gone

Love was when I loved you

One true time

```

这首歌在电影中由席琳·迪翁演唱，成为了经典的爱情电影主题曲之一。