Question: What Oslo-based Norwegian singer-songwriter provided guest vocals for the Tyler album Flower Boy?
Sentence (from "Flower Boy"): Although the album's production was handled entirely by Tyler, The Creator himself, it features guest vocals from a range of artists, including Frank Ocean, ASAP Rocky, Anna of the North, Lil Wayne, Kali Uchis, Steve Lacy, Estelle, Jaden Smith and Rex Orange County.
Relevant evidence: Yes