Sunny alongside with Yuri was a part of reality show Invincible Youth in which they were a part of G7, consisting of 7 girls from idol groups. She is the only returning member from original G7. She has appeared on many shows and was a guest on the show, Jessica, and Krystal. She trained for 3 years and 7 months before debuting in Girls' Generation. Her future activities with Girls' Generation remain in question. In terms of singing, Sooyoung's vocal range is E3-A5.
She featured on the Heading to the Ground soundtrack, singing a duet with Taeyeon in the song SarangInGulYo and another song titled Motion performed with the vocal line of the group.
SNSD Girls' Generation Tiffany Fakes