f(x)'s Luna is performing on 'Immortal Song' with her twin sister!

For the Lunar New Year special of the show, Luna brought along her twin sister and revealed, "All of my family members majored in classical music. My twin sister majored in classical music vocal performance, and my brother majored in music composing, so he edited the song we're singing."

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Luna and her sister, Park Jin Young, are singing In Soon I's "Father" for their parents. You can check out their special performance on the January 28 broadcast of 'Immortal Song'.