Girls’ Generation’s YoonA took to her Instagram to show support for Taeyeon’s new single “Happy.”
On May 4th, YoonA posted a screen shot of her phone streaming “Happy” with the caption, “Right up my alley again” on her Instagram story.
On May 4th, Taeyeon released her highly anticipated single “Happy” on major music streaming platforms which climbed the charts immediately after its release.
Source (1.)