Somewhere Tomorrow
This is an early 1980s supernatural teen romance starring a young Sarah Jessica Parker and her annoying singing voice. SJP's character, Lori, is upset that her mother is remarrying a few years after her father's death. She witnesses a plane crash and speaks with one of the two survivors, a young and handsome (I mean, by early 80s standards, I guess) man named Terry. Soon, Lori learns that Terry actually died in the crash, but that's ok, because his ghost keeps following her around spouting off inspirational crap to help her cope with her father's death. Along the way, they sing sappy songs that will make you cry tears of awkwardness, play hilarious(ly annoying) tricks on one another, and say incomprehensible lines like, "You'd look awfully funny walking around with an invisible shoulder."
Fat and alive Gary Coleman's younger twin brother (idk how that works, either) costars as captain of the friendzone team.