Rihanna has been forced to cancel a show in Sweden because of exhaustion for a second time this week, organizers said.

Live Nation spokesman Kristofer Akesson said the singer felt ill ahead of her concert in Stockholm on Wednesday night, and that she decided in consultation with a doctor to cancel the show about an hour before she was to go on stage.

Rihanna called off a concert in Malmo in southern Sweden on Monday, but was able to perform the following night in Stockholm.

Man pleads not guilty to stalking Gomez

A man with a history of mental illness pleaded not guilty Thursday in Los Angeles to stalking actress and singer Selena Gomez.

Thomas Brodnicki, 46, entered his plea in Superior Court to one count of stalking. Bail was set at $150,000.

Brodnicki is accused of stalking the "Wizards of Waverly Place" star between July and October.