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But the performance will be the star's last for the remainder of the summer (11) after doctor's decided to operate.

She has now scrapped 11 appearances at events like Paris: Orange Rock Corps, Scotland's T In The Park , Oxegen in Ireland and the i-Tunes Festival in London.

In a statement, the star says, "Sorry doesn't feel enough to say, I am devastated for my fans that I know have been waiting to see me and working hard for tickets. I was so excited about the summer and I'm as upset as you all are. But unfortunately these things happen. I have to remain positive and I promise I will make it up later in the year."