Back on February 10, SHINee's Key held Day-6 of his ongoing solo concert, 'Key Land - Key'!

During this particular show, Key told the audience that his good friend and labelmate f(x)'s Amber had flown from the U.S. to attend his concert! The fans cheered for Amber loudly, and Key added, "Ya, let's do a song together~". 

Picking up energy from fans' continuing cheers at the prospect of Key and Amber's collaboration, Key began to sing f(x)'s hit song "Hot Summer". A few sections of the audience joined in little by little, and before long, the entire crowd had a mass sing-along to "Hot Summer"!

Seeing the friendly mood at the concert, netizens commented, "I love this kekekeke", "Shawols are so good at mass-singing kekekeke", "Heol, how did they know all the words??", "Shawols sing so well kekekeke", "Envious of Shawols, but also thanks for singing the song kekekeke. Amber loves it when crowds mass-sing, she must have loved that", "Shawols, natives of the mass-sing-along nation kekekeke", and more!

Alongside Amber, singer Soyu, actor Kwon Hyuk Soo, and stylist Seo Soo Kyung were also spotted attending Key's concert. Listen to the fun moment from the concert below!