SNSD's Jessica and f(x)'s Krystal who released the acoustic version of 'Butterfly' earlier have visited the 'Blue House', the executive office and official residence the President of the Republic of Korea.
They were not there to promote the song but to attend the event for the London Paralympics Team. If we may recall, Jessica and Krystal were appointed as the ambassadors of the said team before.
Check out their photos below where you can also see the President of South Korea~
The President and the First Lady of South Korea, President Lee Myung Bak and his wife Kim Yoon Ok.