Update: It appears that the image used by the Sunday Mirror came from a Instagram selfie by Swedish model Malin Sahlén.
It can be found on this website. Clicking through on the option to locate the source links to a now-deleted Followgram URL, which pulls images from a user's Instagram page.
Malin Sahlén has since told Sweden's Aftonbladet newspaper that she did not give permission for the picture, which is three years old, to be used.
"I do not want to be exploited in this way and someone has used my image like this feels really awful, both for me and the others involved in this," she said.
A Sunday Times reporter alleges that the account used by the Sunday Mirror pulled in photos from at least one other Twitter user.
Original story below.