Fans were given the news as they arrived at the Malmo arena. "It was very sad. It could well have [been] communicated earlier," Natalie Wierenga, told Sydsvenskan, a local Malmo newspaper.
Last month, Rihanna's latest single We Found Love went straight to No1 in the charts.
The Barbadian, who collaborated with Scottish DJ Calvin Harris on the track, ruffled feathers in September with her topless prancing as she shot the music video for the song. It was Rihanna's sixth No1 single.
Farmer Alan Graham, 61, pulled up in his tractor and told the sexy singer to cover up while on his land near Bangor, Co Down, in Northern Ireland.
The filming was taking place in a muddy barley field close to a busy dual carriageway when she stripped to a bikini after removing a long checked dress. But the sight became too much for Mr Graham's Christian beliefs and he politely asked the filming to stop.