Something must be in the water that the artists drink at SM Entertainment because�f(x)'s Amber and Super Junior's Donghae seem to�have grown to look more alike as time goes on.

Amber tweeted,

Old photo of me and dong hae... Me look hella alike in this photo ??? ????? ?? ??.. ??? ?? ???..? instagr.am/p/WeUUPst-im/

� Amber J. Liu (@llama_ajol) March 5, 2013

The photo shows Donghae and Amber making the same "hella" adorable facial expression, making fans agree with Amber about their striking resemblance.

Fans who noticed the SM artists' visual similarities commented, "Amber and Donghae look like siblings," and "SM Entertainment has a lot of artists with similar images and visuals."