Kendall Jenner, of being-related-to-Kim-Kardashian fame, posted a photograph of herself on Instagram last year.
The self-portrait, with her hair spread out on the floor in curls shaped like hearts, was confirmed as the most-liked photograph ever posted on the site.
It has just over 3.5m likes:
But now, that has been surpassed by this slightly grainy photo that Justin Bieber uploaded six weeks ago:
The photo shows Bieber sharing a kiss with ex-girlfriend Selena Gomez and it appears to have gained traction after Gomez liked the photo herself.