She was a member of girl group Jewelry and featured on the reality show We Got Married with Crown J.

Despite being known as the 'sexy dancer' of Jewelry, she stated she wanted to move away from her strong dance image and become a softer, elegant and more sensual entertainer.

The first single from the album was "I Want You" ("너를 원해"), which was written, composed, and produced by Jung Yeon-joon of Uptown.

In February 2008, it was announced that the singer would be participating in the popular MBC variety show We Got Married.

[4] On December 11, 2009, it was announced that Seo In-young, as well as fellow Jewelry member Park Jung-ah, would be leaving the group to fully commit to their solo careers.

[7] In early 2011, the Jongno branch of Cheil Industries named Seo In-young as the creative director of their imports division.

Seo In-Young's rendition of Just Like The First Time won the hearts of viewers and was declared as the best performance of the episode.

On November 13, 2011, the singer officially released her third album, Brand New Elly, with the lead single Oh My Gosh.

On August 13, 2012, a music video teaser for Seo In-young's digital single, ANYMORE, was released.

On May 2, 2013, Seo In-young announced that she would be making her first comeback of the year with the release of concept photos and a music video teaser.

The album is considered Seo In-young's return to ballads and contains the promotional single "Let's Break Up.

"[13] On September 23, 2013, it was announced that Seo In-young would be returning to the music scene with a digital single titled "Love Me".

According to Seo In-young, the song is "an upbeat dance track through which she puts aside her previous ballad concept".

[17] Seo in Young returned to Star Empire after 4 years, stating it was a "move of loyalty".