I've watched the entire series of "My Love From The Star" 별에서 온 그대 The television show is very captivating, and brilliant. It was hugely popular in 2014 not only in Korea, but all throughout most of Asia. There are now plans for an American re-make of the show on ABC. Anyway, watching it, I could not help but notice a slight similarity in the theme song (which is played in every episode many times) to a few bars of the big huge theme of phantom of the opera. It's not exactly the same....but very similar. "You Are My Destiny..." (Korean show) and "in sleep he sang to me...."
The choruses to both Let It Go (2014's Best Original Song Oscar-winner from the animated pic Frozen) and Sunflower (released 2009) by Korean actor Park Sang Min, share melodies and chord progressions (though in different keys, LIG: Ab major vs Sunflower: C major). Both utilize a commonplace I-V-vi-IV (or 1-5-minor6-4) chord progression, found in myriad songs, including Let It Be, Don't Stop Believin', and With Or Without You. However, the melodies are very similar. Let It Go (1:00) VS Sunflower (2:55).