What are some tracks with such an identifiable style that you can tell who wrote them even if they're performed/released by someone else?

Inspired by listening to "Borderline" by Tove Lo that has heavy synths and a vocal style so reminiscent of Dua Lipa that I thought it must've been written for her just from a first time listen. Turns out, Dua was a writer on it with Tove Lo and decided to not keep it for herself!