Seohyun joined the SNS in October 2014, so it's been just over 1.5 years and she's already at 3 million followers. Seohyun posts a lot of photos not just of herself but also of Girls' Generation members and fellow SM Entertainment idols.

SEE ALSO: "They're so good, this is what K-pop should be like," Girls' Generation's past live performance gains spotlight after 8 years

If you don't follow her yet, you can do so @seojuhyun_s!

Tip: Nghi