RIHANNA APOLOGIZES FOR CANCELING CONCERTS ON HER "DIAMONDS" TOUR

Rihanna is apologetic for disappointing her fans.

The "Stay" singer canceled two more shows on her "Diamonds" tour this week due to illness, and was spotted leaving a medical center in Beverly Hills, Calif. on Tuesday.

She responded in a post via Instagram, expressing her sincere apologies for not taking the stage in Houston, Texas on Monday night.

"I was sick since San Diego! I kept working because I thought two days off after the Vegas show would be enough time to recover and I f---ed up," the 25-year-old star, who also canceled her Tuesday show in Dallas, explained.

"Those were two days off from hell and today is not different! I'm sad and disappointed about it! I had all kinds of plans for Houston!"

Prior to this week's cancellations, RiRi also fell ill back in March and was a no show for her concerts in Boston and Baltimore -- reportedly due to laryngitis.

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