The most-liked photo on Instagram used to be of Kardashian half-sister Kendall Jenner.
The photo has more than 3.5 million likes (or 7 million double-taps), which is no small feat.
The photo shows Bieber kissing his ex-girlfriend, actress and singer Selena Gomez. After Gomez liked the photo on Instagram, it gained traction, according to The Independent. The photo was taken several years ago.