'World star' Psy's recent slim face has gained much attention.

Today, he posted on his twitter, "I'm wearing a different tuxedo to work today," along with a picture.

In the picture, he is wearing his usual "Gangnam Style" outfit as he takes a picture through the mirror. However, his body and face seem to look much slimmer than before.

Internet users commented, "He lost weight due to dancing the 'horse-riding' dance all the time" and "I kind of feel bad for him."