Rihanna is apologizing to at least one fan after cancelling two back-to-back Texas shows this week.  According to E! News, one Instagram user captured an exchange with the star, who commented on the postponement of her concerts in Houston and Dallas this week.

Rihanna wrote that she’s been “sick” since her show in San Diego last week, and that the two days she had off weren’t enough for her to recover.  She called the break “two days off from hell,” adding that she was “sad and disappointed” over the cancellation.

Tuesday’s cancellation in Dallas was the fourth time Rihanna let fans down on her “Diamonds” tour, which has been on the road for over a month.  The tour has also ran into some other problems, including a tour bus pot bust at the Canadian border.

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