f(x)'s Luna shared a cute photo of herself from backstage of a music program on recently . She wrote, "It's been a while since we recorded 'The Show'. I'm wearing blue nail polish for the first time. I feel like it matches with my stage outfit so I'm feeling good!" Fans responded, "So cute!" "Your eyes have turned into a cute half moon!" "You get prettier as the days go by," and "Your red hair and blue nail polish look good on you." f(x) released their repackaged album "Hot Summer" to great fanfare on June 14th. Source + Photo: Nate