[Video] Seo Hyun showed TRAX some love on Music Bank!

Music Bank, Trax, Video,

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Seo Hyun of SNSD showed TRAX some SM love on today's Music Bank!

TRAX performed their new song "Cold Hearted Man" as usual on Music Bank today,however their performance is special today as Seo Hyun played the piano for their performance today.

Watch TRAX's performance on Music Bank here,love it or not??

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