Here is one way to find the unknown words in a song (= lyrics) and also the name of the song:
1) Find a short phrase (10 words or less) where the words are very clear. In this song, "Love me forever, And let forever begin tonight" is very clear. The last five words are very special.
2) Type the short phrase into Google. Be sure to put quotation marks before and after the phrase. Then add the word lyrics.