The Copenhagen Post claims that critics from "all of the major media outlets" in the country slammed the performance, calling the singer’s vocals weak and tuneless.
One reviewer wrote: "She looked and sounded like a person who doesn't have many years left to live. At the end of the show she looked like she was ready to explode."
Houston reportedly turned on part of the audience when they began booing as she made a speech paying tribute to Michael Jackson, according to Contactmusic.
A similar walkout was reported when the singer performed in London in May.