Girls' Generation's Taeyeon turned 26 (25 in international age) on March 9 and SONE all over the world wished her a happy birthday as soon as the clock struck midnight in Korea.

SEE ALSO: Fans buy a bus advertisement for Taeyeon's 25th birthday

Taeyeon definitely has a lot to celebrate this year with first and foremost, Girls' Generation's long awaited comeback as well as their domination on music charts and incredible win on 'M! Countdown' for their first comeback stage. SONE's have been celebrating their kid leader's birthday early with bus advertisements going around weeks ahead in honor of Taeyeon and her birthday is also trending with #26thTaeyeonDay!

Happy Birthday! The kid leader is growing up into a beautiful lady.