I'm looking for the name of this song from Harry Potter and the Half Blood Prince.
It plays towards the end of the hilarious scene where Ron has eaten the love-potion laced chocolates.
The song overlays where Ron returns to sitting on the floor pining to the moon.
The complete track is called 'Ron in Love' and is from the recording sessions and is not on the OST.
The piece I'm looking for is a snippet within this track at the 1m24s mark in the linked video (you hear it played as bells).
I believe it is popular song refrain.
Does anyone know the name of this song..?