[This Day] SNSD Tiffany performed 'Once in a Lifetime' feat. Seohyun

Four years ago, today, SNSD's Tiffany made her solo debut on Music Bank!

She sang 'Once in a Lifetime' and Seohyun was also there to the play the piano for her unnie.  It was indeed a once in a lifetime event.  Join us as we reminisce this sweet moment~

It has been four years already? Yes, time flies really fast!

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