Wonder Girls debut in February 2007. They come with single 'The Wonder Begins' or commonly known as 'Irony'.
"Today is the fifth anniversary of the Wonder Girls!" Yubin write through her personal Twitter account on Friday (02/10/2012).
Mates of their agency, Taecyeon '2 PM 'also do not forget to say congratulations. As a junior he feels 2PM could never exist without the Wonder Girls.
"This is the fifth anniversary of the Wonder Girls! I want to congratulate the senior wholeheartedly. If there is no Wonder Girls, 2PM will not be exist. My tears spilled like a tsunami. Congratulations on the fifth years!" Taecyeon wrote via his Twitter account.