When singer and actor Seo in Guk's new album, "Laugh Then Cry," was released on April 11th, it quickly shot up the musical charts.

Making the album and music videos involved some collaboration. Producers Hwang Se Jun, Mellow Design and Kim Ji Hyang wrote the song and lyrics for the soul ballad that became the title track.

Actress Goo Hye Sun composed a song on the album and appears with Seo in the music video for the title song. Although Goo has composed songs before this is the first time she has done so for another artist.

They make an attractive couple in the romantic music video. There are plenty of sweet images of the seemingly happy pair before you realize their happiness is in the past. A lonely Seo is only remembering how much better his days were when Goo was in them. His life is going up in flames and his love interest is no longer around to put out the fire.

On the same day the album was released Seo made a comeback performance on the show M!Countdown. He has not had much time for his music lately as he has been focusing on his acting. He appeared as Yoon Yoon Jae in "Reply 1997" and "Yoo Seung Gi" in Rascal Sons.

Netizen reaction to the music video was positive on all counts. Fans thought Go Hye Sun looked stunning in the red lipstick she wore, that the singing was "soulful," and it was "perfection" to see the two actors together.

Goo, who is also a director and producer, has played part of an attractive couple before. She was Geum Jan Di opposite Lee Min Ho's Goo Jun Pyo in "Boys Over Flowers" and singer Go Eun Bi to composer Hong Jae Yi, played by Daniel Choi.

Fans may be surprised to learn that she started her career as a singer. She was originally meant to debut in a three-member girl group with 2NE1's Park Bom and Sandara Park but was advised to pursue acting instead of singing. She has also gone on to have both a singing and acting career. She covered several songs, then composed and released an album of New Age music called "Breath, as well as two singles.

Seo began his singing career when he won the talent contest on the show Superstar K. He had a small acting role in "Love Rain" but had his acting breakthrough in the series "Reply 1997. He also made his Japanese singing debut this year, with the release of the single "Fly Away."

Fans hope the couple will have more chances to collaborate in the future.