It was almost two hours into the concert when Maggio announced Hellström by exclaiming, "If Håkan doesn’t come, I’ll cancel," writes Aftonbladet.
Together they sang their joint song "Hela huset" and Hellström's "It will never be over for me".
The stadium exploded, says Aftonbladet's music critic Markus Larsson to his own newspaper.
During the evening, Salem Al Fakir, Vincent Pontare and Miriam Bryant also made guest appearances.
The sold-out gig marked the 10th anniversary of Maggio's concert at the stadium in 2016, when she performed what was said to have been the largest concert by a Swedish female artist at the time.
