I wonder if their should have been used instead of its. I know the writer is taking "Years of struggling with substance abuse" as a sort of noun, but you can say that "Years have taken their toll on the singer-actress." I don't know.
FROM A SPORTS ARTICLE: This year they’ve hit on something very unique: Draft picks will be announced from outer space.
No, no, no, no, no. If something's unique, it's unheard of, spellbinding, beyond rare. It doesn't need any help from very.