Rihanna has canceled yet another concert on her anticipated "Diamonds" tour. According to Live Nation, the "Wait Your Turn" singer is still struggling with an "illness" and was simply unable to return to the stage in Dallas, TX Tuesday.

Rihanna is struggling with some form of illness and was unable to perform at a planned concert Monday night. According to Live Nation, the "Pour It Up" singer was forced to cancel a show in Houston "as a result of illness," but plans to return to the stage in Dallas Tuesday.

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Rihanna is not happy about having to cancel not only a show, but one of her first shows on the "Diamonds World Tour."