I have always adored how gorgeous Linda Blair looks in Exorcist II: Heretic. Always. It's when I saw her in that film that I developed a crush (yeah, I said crush…)

Those lips, those eyes, her hair, those cheeks! She's stunning.
Fatal Bond is so rare we can't even find it here in Australia where it was shot! But I just found it online so I guess all is not lost (I've never seen it).
I believe her best film outside of The Exorcist might be Born Innocent or Chained Heat.