Sick Demi Lovato has canceled her concert at London's O2 arena on Sunday night.
The performer made the announcement to her 68 million followers on Instagram.
She wrote: "I write this through tears of frustration and sadness that I have to postpone my concert tonight due to being very, very sick and with swollen vocal cords. If I go on tonight and injure my vocal cords any more I could potentially have to cancel the rest of the tour. I'm so, so sorry to disappoint any of my fans in London that have traveled hours to be here by plane or car and to all of the fans that got these tickets for a special occasion."
The 25-year-old has tour dates scheduled this week for Tuesday, Wednesday and Friday, but no decision has been made if she will be able to perform.
It is understood that the 'Sorry Not Sorry' singer is resting under her doctor's orders.
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