Everybody here wants to know the title of the various songs but nobody commented on Suby's great score ! It's absolutely beautiful with one of the most touching themes in (my) movie history.
Kayleigh's Theme during the funeral is heart-breaking, builds up nicely with the piano and then expands to the great string section. The whole score has this dreamy attitude, which Suby transported and varied nicely through every iteration of the different realities.
Hope to hear more from Michael Suby soon ...