Rihanna has canceled another show on her "Diamonds World Tour" Monday.
The Grammy-winning singer was scheduled to perform at Houston's Toyota Center but has canceled the performance "as a result of illness," promoter Live Nation told the Associated Press.
Concert-goers were advised to hang on to their tickets for a rescheduled concert date to be announced. Refunds were also available at the Toyota Center.
Riri, who canceled shows in Baltimore and Boston last month during a bout with the flu and laryngitis, is still expected to perform as scheduled in Dallas on Tuesday, Live Nation said.