After partying her face off in Las Vegas [click here if you missed that], RiRi is too sick to perform in Houston...
From E Online
Rihanna is apparently too sick to sing again.
Live Nation announced that tonight's show in Houston will not go on "as a result of illness," but the concert promoter stated that people should hang on to their tickets so that they can be honored at a later date.
Rihanna previously missed two dates on her Diamonds World Tour in March due to laryngitis.
