When it comes to fan service, Taeyeon is one of the sweetest!

The singer expressed her thankful heart toward all her loving, loyal fans for her successful first solo concert 'Taeyeon, Butterfly Kiss.'

Along with sharing a picture of herself holding up a placard imprinted with the words, "I will wait again, I will look forward to it more," Taeyeon wrote a sweet message that reads, "You have no idea how many people endured hardships for the longest time to prepare this concert. Among them are all the SONEs who believed and waited until the very end. I truly feel once again how happy I am. My 28-year-old self, this precious moment. My precious fans."