F(x) Amber and Lovelyz Kei perform together for a collaboration stage with MFBTY & Yongguk at today's Supermodel Contest.
Netizens and both of their fans find their interaction on stage adorable commenting that they look so close and friendly with each other. Some say that Amber looks like a big and caring sister to Kei to make the rookie idol more comfortable on stage with other performers.
Kei on the other hand looks cute and lovely dancing along with the other artists and having fun on stage. Watch their performance below: