Rihanna has expressed her sorrow at having to cancel a show last night (March 10) due to illness.

The superstar singer was due to perform at Boston's TD Garden as part of her Diamonds World Tour but the gig was pulled at the last minute because of laryngitis.

Promoter Live Nation confirmed the news in a statement: "Unfortunately, following her sold-out concert on Friday, Rihanna has contracted laryngitis and per doctor's instruction is unable to perform this evening."

It didn't sit too well with the star herself, with Rihanna tweeting that her pride has been dented as a result of the cancellation. The 'Stay' singer said:

"#BOSTON this is the hardest thing for me to deal with! I feel like we've been waiting on this day forever, and I'm hurt that I let you down. I hate disappointing people that never ever let me down!! I'm so embarrassed about this! Thank you for your prayers and well wishes!#DWT."