Question: What Oslo-based Norwegian singer-songwriter provided guest vocals for the Tyler album Flower Boy?
Context: In the Lonely Hour is the debut studio album by British singer Sam Smith.  It was released in the United Kingdom on 26 May 2014, via Capitol UK and Method Records.  In the United States, it was released on 17 June 2014 through Capitol Records America.  The album includes the hit singles "Money on My Mind" and "Stay with Me", both of which were number one in the UK; the latter becoming a hit worldwide, peaking in the top ten in over 20 countries, including reaching number two in the US.  The album's third hit single, "I'm Not the Only One", reached number three in the UK and number five in the US.  A deluxe edition of the album contains five bonus tracks, including a solo acoustic version of Disclosure's single "Latch" and Naughty Boy's number-one single "La La La", on both of which Smith provided guest vocals. Old Traditions, New Standards is the debut album from the Washington-based indiepop band Tullycraft.  It was produced by Pat Maley.  Tracks were recorded at Avast Studios in Seattle and mixed at Yoyo Studios in Olympia.  The album was originally released on Harriet Records out of Cambridge, Massachusetts.  Perhaps the band's best known song "Pop Songs Your New Boyfriend's Too Stupid To Know About" first appeared on this LP.  Robynn Iwata from the band cub provided guest vocals on the song "Josie," and Chris Munford from the band Incredible Force of Junior provided guest vocals on the song "Mental Obsession."  The album reached #22 on the CMJ Top 200 chart.  The song "Pop Songs Your New Boyfriend's Too Stupid to Know About" was listed as essential listening in Pitchfork Media's 2005 article on Twee Pop entitled "Twee as Fuck." "911 / Mr. Lonely" is a song by American rapper Tyler, The Creator.  It was released on June 30, 2017 alongside, "Who Dat Boy" through Columbia Records, as the lead singles from his fourth studio album "Flower Boy".  The song was produced by Tyler himself and features vocals from Frank Ocean, The Internet's Steve Lacy and Norwegian singer Anna of the North. Flower Boy (alternatively titled Scum Fuck Flower Boy) is the fourth studio album by American rapper Tyler, The Creator.  The album, which is his first under a major record label, was released on July 21, 2017, by Columbia Records.  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. Gottfried (Graf) von der Goltz (born 1 June 1964 in Würzburg, Germany) is a German-Norwegian violinist and conductor, specialising in the baroque repertoire.  His first teachers were his parents, Georg Conrad von der Goltz and Kirsti Hjort.  After further education in Hannover, New York, and Freiburg, he joined the radio orchestra of Hamburg's Norddeutscher Rundfunk at the age of 21.  Two years later he left in order to focus on his career as a soloist, chamber musician, and conductor.  He is now musical leader of the Freiburger Barockorchester.  From 1997 to 2004 he held a professorship with the Hochschule für Musik Würzburg.  In October 2004 he was called to a professorship in violin and baroque violin at the Hochschule für Musik Freiburg.  Since January 2007 von der Goltz has also been artistic director of the Oslo-based Norwegian Baroque Orchestra.  His interests include salt-water swimming and gøbbing (exchanging ideas with members of a think tank).  Gottfried von der Goltz's extensive discography and DVD production include recordings as soloist, chamber musician, and conductor, also of larger scenic works, like Rameau's Dardanus. Evig Poesi ("Norwegian for «eternal poetry»") is an Oslo-based Norwegian rap group.  The music is influenced by artists such as A Tribe Called Quest, De la Soul and DJ Krush. Beyond51 (full name Beyond51 Productions) is an Oslo-based Norwegian music production house and record label.  Beyond51 was established on 26 June 2008 by producers Kjetil Helgesen and Victor Eugen Forberg-Skogeng.  Soon after, Marcus Ulstad Nilsen and Andreas Sjo Engen joined the party which forms today's team. Anna Lotterud (born 8 June 1989), better known by her stage name Anna of the North, is an Oslo-based Norwegian singer-songwriter from Gjøvik.  Her music has been regarded as "soft, soul-bearing electro-pop". PowerTech Information Systems AS is an Oslo-based Norwegian Internet service provider founded in 1993. George "Corpsegrinder" Fisher (born July 8, 1969) is an American extreme metal vocalist for the American death metal band Cannibal Corpse, the lesser-known melodic death metal band Paths of Possession, and the lesser-known extreme metal supergroup Serpentine Dominion.  He recorded two albums with Florida's Monstrosity before leaving and joining Cannibal Corpse in late 1995, replacing vocalist Chris Barnes, who is now the vocalist for Six Feet Under.  He also provided guest vocals for New York technical death metal band Suffocation on the songs "Reincremation" and "Mass Obliteration" from their debut album, "Effigy of the Forgotten", as well as guest vocals for California deathcore band Suicide Silence on the song "Control" from their fourth album, "You Can't Stop Me".  Fisher also performed guest vocals on Job for a Cowboy's 2014 album "Sun Eater" on the song "The Synthetic Sea."  As a death metal vocalist, Fisher employs the "death growl" extended vocal technique.
Answer: Anna of the North