It's gonna be a snowy Kpop Christmas, as Girls Generation's vocal sub-unit comes back with a winter song.

Taeyeon, Tiffany and Seohyun are dropping a new track on the first week of December, according to Nov. 2 reports, writes AllKpop.

Girls Generation has been very active in music this year. The top girl group released "Catch Me If You Can" in Japan early this year, before releasing "Party," "Lion Heart" and "You Think" in Korea. Taeyeon also debuted solo with "I" last month and is still actively promoting.

So far, all songs charted high, sold well and won awards. That means we have high expectations for TaTiSeo.

The December comeback will be the unit's third album, following "Twinkle" and "Holler."

While Girls Generation balances between singing and dancing in its music videos, TTS comebacks are more vocally challenging, as expected from SNSD's three divas.

TTS member Tiffany is scheduled for a solo debut after the December comeback. Taeyeon, on the other hand, is expected to wrap up her "I" promotions to prepare for TTS promotions.

Meanwhile, let's take a look at TaTiSeo's previous comebacks.

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