Caroline Furøyen, also known by her stage name Caroline Ailin (born 1989), is a Norwegian singer and songwriter based in London. She co-wrote "New Rules," a single by Dua Lipa which reached number 1 on the UK Singles Chart and US pop radio in 2017. She has also worked with a variety of other acts including, Zedd, Katy Perry, Clean Bandit, Ellie Goulding, Ella Mai, Louis the Child, MØ, and numerous others.