Adele has cancelled her final two shows of her world tour at Wembley Stadium with damaged vocal cords, saying she's "devastated".
"I don't even know how to start this," she writes in a lengthy Facebook post, before explaining how she's "struggled vocally" in her first two London shows.
"I had to push a lot harder than I normally do… It turns out I have damaged my vocal cords. And on medical advice I am simply unable to perform over the weekend.
"To say I'm heartbroken would be an understatement."
The singer says she wanted to push through for the Saturday show, but "simply can't crumble in front of you and all and walk out on you in that way".
She says she even considered miming, just to be in front of the crowd, but could never "in a million years do that".
"I'm sorry for the nights you would have had with your loved ones and memories you would have made together. I'm sorry for the time and money you spent organising your trips.
"Not to complete this milestone in my career is something I'm struggling to get my head around… It's as if my whole career has been building up to these four shows.
"I'm sorry. I'm devastated."
An Instagram post only days ago shows a handwritten letter from Adele thanking her fans, saying it may be her final tour.
"I wanted my final shows to be in London because I don't know if I'll ever tour again and so I want my last time to be at home."
Adele played to three sold-out crowds at Auckland's Mt Smart Stadium in March, her first visit to Australia and New Zealand.
Her tour has seen her perform 121 shows around the world within a year.