Rihanna Rihanna

Rihanna was forced to cancel a concert in Sweden on Monday after she was hospitalized for severe exhaustion, The Associated Press reports.

The "Umbrella" singer was deemed "not capable" of performing and took to Twitter to apologize to fans for having to cancel the Malmo concert last-minute.

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"I am sorry to everyone was coming out to my show in Malmo, Sweden," she said in a statement. "It would have been a great time... so much better than being sick with the flu. Ugh! I'm really disappointed I couldn't be there."

Rihanna is scheduled to perform in Stockholm on Tuesday night.