BRIT Award-winning artist cancels entire European tour after 'life-threatening medical emergency'CultureSep 21 at 5:30 PM – Sep 22 at 5:24 AM3 outletsBillboardHolly Humberstone Cancels European Tour After ‘Life-Threatening Medical Emergency’ Sep 22 at 5:24 AMLBCBRIT Award-winning artist cancels entire European tour after 'life-threatening medical emergency' seen Sep 21 at 5:30 PMPerthNowHolly Humberstone cancels European tour after 'life-threatening medical emergency' Sep 22 at 3:08 AM