Thankfully, f(x) was able to return asap after Amber, Krystal, and Sulli was diagnosed with swine flu by performing yesterday on KBS Music Bank. As usual, f(x) performed their track Chu~♡ with all the members as they returned on today’s MBC Music Core. Their performance was lovely and of course, cute! It’s great to see them back performing, looking as healthy as ever. Check out the Chu~♡!