Jess and Rory have "Then She Appeared" by XTC that plays, when they have their first kiss as a couple.

Oh yes, that's a great moment and song.

Oh, Rory and Dean have that PJ Harvey song playing, as they kiss after the "Because I love you, you idiot!" moment.

But I think LL are the only ones who have a song that gets played more than once, as a callback.

I like they have that as a unique thing to them. :)