Demi Lovato released a statement just hours before her Sunday night show, cancelling her appearance due to illness. The American pop-singer was scheduled to appear at London’s 02 Arena, but tweeted out her apologies at 5.17pm, less than an hour before doors were set to open at 6pm.

She explained in the statement that she had swollen vocal chords and was “very, very sick”, and had even been examined by an ear, nose and throat doctor to determine the seriousness of her illness. After consulting with them, she concluded that pushing herself to perform could injure her vocal chords, causing her to cancel the rest of the tour.

Her statement went on to apologise specifically to fans “that [had] travelled hours to be [there] by plane or car” as well as to fans that received “tickets for their birthday, holiday or any other special occasion.” She reiterated that she wouldn’t ever cancel a show unless she “absolutely had to”, and made it clear that she shared fans’ inevitable frustration.

The London date of her tour has been moved to June the 25th, and all tickets for the former date are still valid. The singer is scheduled to perform in Birmingham, Glasgow, Newcastle upon Tyne and Manchester in the coming weeks, but as of yet hasn’t confirmed those shows will be affected as well.