911 / Mr. Lonely features vocals by the Norwegian singer-songwriter from what city?
911 / Mr. Lonely:  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. Anna of the North: 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.
Gjøvik