Rihanna Rihanna

Rihanna has canceled a third date on her "Diamonds World Tour", The Associated Press reports.

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The 25-year-old singer was forced to pull the plug on her Monday show in Houston "as a result of illness," concert promoter Live Nation said. The company said fans should hold on to their tickets to use at a still-to-be-rescheduled show.

Rihanna canceled concerts in Baltimore and Boston last month because she was sick. She is next scheduled to perform in Dallas on Tuesday.