Rihanna: still ill

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It's officially called the "Diamonds World Tour." But these days, the Rihanna tour could go under the unofficial name: "Catch Her If You Can Tour."

The singer has missed another show due to illness. Live Nation says Rihanna missed last night's performance in Houston because she was sick. Last month, she missed shows in Boston and Baltimore because of illness.

The promoter says fans should hold on to their tickets to use at a rescheduled show.

The next date on Rihanna's tour is tonight in Dallas.

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