query: Which guest appearances did First Aid Kit make in 2018?
answer: First Aid Kit appeared in 2018's Van William's song "Revolution" on the Countries Album, Alela Diane's song Ether & Wood, off her album Cusp, in George Ezra's song Saviour, on his album Staying at Tamara's and in Little Jinder's song Goldwing, on her album Hejdå.