Foxes has cancelled her remaining UK tour dates after a bout of flu developed into a "full blown chest infection."
The singer was due to appear in Glasgow tonight, before travelling to Newcastle, Liverpool and Southsea. All of those dates have now been postponed.
In a statement on Twitter, the singer - who released her second album, All I Need, last month - said, "As you know I've been forced to cancel some recent shows due to flu. This has now developed into a full blown chest infection."
She continued, "My doctor has advised me it will take a week to clear up with rest and I have to cancel the remaining dates. I feel awful - I've been enjoying playing the new songs to you all so much - but I can hardly talk let along sing right now. It breaks my heart to cancel these shows, I'm so sorry."
She has vowed to reschedule the cancelled dates, and to come back "stronger than ever."
— Foxes (@iamfoxes) March 10, 2016
See Foxes' cancelled UK tour dates below.
Thu March 10 2016 - GLASGOW O2 ABC
Fri March 11 2016 - NEWCASTLE UPON TYNE Riverside
Sat March 12 2016 - LIVERPOOL O2 Academy2 Liverpool
Sun March 13, 2016 - SOUTHSEA The Wedgewood Rooms