EXO returned to K-pop with their sumptuous, dark-toned winter mini album, "Sing for You."

The now-nine-member SM Entertainment group simultaneously released the album and the music video for the lead track, "Sing for You," on December 10 at midnight KST.

On the album, EXO delves into their soulful essence for "Girl X Friend" and is equally compelling on "Unfair."

While "Sing for You" is billed as a winter release, the only song that captures the emotionality of the holidays is "On the Snow."

In addition to the four new tracks, the album contains the "Star Wars" tie-in, "Lightsaber." The music video for "Lightsaber" included imagery from the popular sci-fi franchise and concluded with the illusion of a burgeoning fight scene involving the legendary weapons.

However, EXO captivated the audience of the 2015 Mnet Asian Music Awards (MAMA), with their live performance of the song, with choreography that included wielding the fictitious sword.

In 2015, EXO continued their foray beyond K-pop, with several members successfully taking on theatrical roles.

EXO continues to make inroads beyond Korean pop, as the members successfully transition into acting.

D.O. (Do Kyung Soo) continues to be one of the most recognizable dramatic stars within the group, following his critically-acclaimed breakout role in the social commentary film, "Cart," followed by his compelling portrayal Han Kang Soo, a schizophrenic manifestation in "It's Okay, That's Love."

His success as an actor has helped pave the way for other members of EXO, who are actively pursuing roles in both television and film.

Chanyeol will appeal to Chinese-speaking audiences with his upcoming film, "So I Married An Anti-Fan," which also features an appearance by Seolhyun of Girls' Generation.

Baekhyun is slated to make his film debut opposite teen phenom, Yoo Jin Goo, in "Dokgo." He is also rumored to be a potential cast member of the star-powered Korean drama, "Moon Lovers," an adaptation of a popular Chinese novel-turned-drama.

Suho also has great potential as the member of the solid cast of "Glory Day," a film which stars Ji Soo and Shinhwa's King Dong Won.

Xiumin recently appeared opposite "We Got Married" fan favorite, Kim So Eun, in the web series, "Falling for Challenge."