Taeyeon looked back on 2015 at TaeTiSeo's comeback showcase 'X-Mas Special Dear Santa' on December 3.

Taeyeon shared, "Looking back, I realized that I did a lot this past year. In the beginning of the year, I featured in f(x) Amber's album, and everything went from there. There was something by Taeyeon every month. I worked hard without even thinking that I was working hard."

TaeTiSeo also commented, "It's impressive that we released a TaeTiSeo Christmas album. We told our agency in February that we would release an album in the first week of December. We succeeded."

Can you remember the projects Taeyeon was a part of this year?