Girls' Generation leader Taeyeon is topping all the charts this week with her new single "And One" from the That Winter, The Wind Blows OST.

There was a lot of excitement earlier this month when it was announced that Taeyeon would be adding her talent to the soundtrack for the popular SBS drama That Winter, The Wind Blows - and the song has definitely not disappointed.

Following in the footsteps of Gummy and The One, the latest addition to the OST, "And One," has shot Taeyeon to the top of the music charts.

This week the single debuted on the Billboard K-Pop Hot 100 chart at No. 1. "And One" also put the Girls' Generation frontwoman at No. 4 in the Melon rankings and in 2^nd place on the GaOn chart.

This is no surprise, especially after the success of other songs from the soundtrack to the popular TV drama, most notably "Snow Flower" by Gummy which previously held the top spot on the Billboard list.

The soft melody highlights the singer's refined voice and Taeyeon sings with compassion and ease. The lyrics are genuine and express the emotions abounding star-crossed love. The piano accompaniment soothes the listener and gives Taeyeon an excellent platform to show off her vocal talent.

"And One" was written and composed for Taeyeon by Kangta, who previously penned Yesung's "Gray Paper." It first appeared in the March 7 episode of That Winter, The Wind Blows and was officially released on March 13.

But of course this is not the first time Taeyeon has appeared on a popular OST. Her solo career has included tracks for many TV dramas including the theme song "If" from the KBS2 show Hong Gil Dong, which also became very popular.

Fans can likely expect to see Taeyeon's talent on many future original soundtracks.