Aside from SooYoung, Tiffany and SHINee's Key also came to M Countdown today to show their support for TaeYeon's solo promotions.
From the waiting room, you can browse the adorable photos of the three below~
Release Date: February 28, 2017
Release Date: January 17, 2017
Release Date: June 28, 2016
Release Date: December 10, 2016