Girls' Generation debuted back in 2007 with "Into the New World," truly starting a whole new wave for both K-Pop and girl groups and making history.

Now, believe it or not, it has already been nine years since the girls have been active in K-Pop, taking over the industry by storm, and fans are celebrating via Twitter with "#9YearsWithSNSD," which is trending worldwide!

Happy 9th anniversary, Girls' Generation! �Congrats on your immensely successful career thus far, and we look forward to many more years to come!

SEE ALSO: "They're so good, this is what K-pop should be like," Girls' Generation's past live performance gains spotlight after 8 years

I've been into this fandom since JHS.I can't believe 9 years has passed and my unconditional love toward them still the same

Kymmie