This is what I found on google about her being an idol:
Sugar's Hwang Jung Eum, Park Soo Jin, and Han Ye Won
Sugar debuted in 2002 and was under SM Entertainment. They promoted in both Korea and Japan until they disbanded in 2006
The source is soompi, which is pretty reliable as far as I know.
The article:
https://www.soompi.com/article/1355794wpp/actresses-who-originally-debuted-as-idols-in-the-early-2000s#:~:text=Sugar's%20Hwang%20Jung%20Eum%2C%20Park,until%20they%20disbanded%20in%202006.&text=Hwang%20Jung%20Eum%20has%20been,a%20few%20hit%20K%2Ddramas.
The youtube channel of her group:
https://www.youtube.com/channel/UCOICHVChGhsww1IDZxt8Wew
I couldn't find the group on Spotify, but Hwang Jung Eum does have one song called good person on Spotify.
the wiki page of the group:
https://en.wikipedia.org/wiki/Sugar_(South_Korean_group)
I don't know how deep you want to go into this but, I hope this was at least useful or interesting