This performance was back in February. I'm not sure why it took me so long to find this video, but I'm glad this 4 minute video came into my life~

E - Eunji (Apink)

L - Luna (F(X)

S - Solar (Mamamoo)

A - Ailee (Soloist)

The name is unofficial, but it works.

This video doesn't even require an explanation. It's pretty aparent that this song was sang perfectly by these 4 ladies. They all have very strong and unique voices and it might seems like it would be hard to harmonize with each other. But it was Amazing!! They weren't trying to out-sing each other. Ailee and Luna didn't outshine the others because Solar and Eunji can easily hold their own. That bit at the end almost had me in tears, Every note and adlib was beautiful T_T

This might actually be my favorite artist collab in all of Kpop. I am personally not the biggest fan of ballads, however I will listen to anything that sounds nice. 

This is a true masterpiece!

I need a part 2.

*claps*