I found out about her in the music video down below when she was with Junhyung and Doojun of BEAST.
I hope she makes a comeback this year, or finds a company that doesn't have her on the back burner like it appears. She's a great singer, but think her voice is better in non cutesy type of songs. I don't know, personally like her style in the first video more so than her other music videos, but she does have a nice voice.
Some information about her:
Name: Gina Jane Choi ( 최지나 )
Stage Name: G.Na
Date of Birth: September 13, 1987
Hometown: Vancouver, Canada
Height: 168 cm (5''5)
Languages Spoken: English and Korean
Discovered: Through the reality talent show “Let’s COKE PLAY! Battle Shinhwa” (2005)
* Lived in Canada for 17 years
* Modeled for Lie Sang Bong’s 2011/2012 Fall & Winter collection Seoul Fashion Week at Seoul’s SETEC Center on March 30, 2011 along with Jessica Jung from SNSD
* Participated in United Cube Concert
* Was set to debut as the leader of five member girl group Five Girls along with After School’s UEE, Wonder Girl’s Yoobin, Secret’s Hyosung and former T-ara member Jiwon in 2007, but did not due to financial issues in the company
* Was one of the backup dancer’s for Hyuna’s digital single “Change”