On the artist's Instagram account, her team announced that she has been hospitalized since Friday.
"We will be back shortly with more information about new dates for the concerts that have been canceled. Kikki sends her regards to all of you and hopes to see you soon!" the post says.
Her longtime collaborator Sören "Sulo" Karlsson tells Sveriges Radio that the flu affected Kikki's breathing.
Instead of playing in Umeå, we had to go to the hospital.
In addition to the tour stops in Luleå and Umeå, the gigs in Trollhättan and Varberg also appear to be postponed.
What do you think?