Krystal talked about crying after f(x) won their first trophy with their latest track "4 Walls".

On the latest broadcast of SBS Power FM's 'Cultwo Show', Krystal was asked about crying after f(x)'s win. DJ Kim Tae Kyun commented, "You don't seem like the kind of person who cries." 

Krystal responded, "We all cried. After going through a lot and experiencing a number of things, it made me think that the suffering we went through was worth it." 

Luna added, "She also posted to her SNS, thanking the members for accepting her stubbornness," to which Krystal replied, "The members put in a lot of opinions for this album. I was referring to that kind of stubbornness."