Time sure flies as the ladies of 2NE1 are already celebrating their 4th anniversary!

The fierce ladies debuted exactly 4 years ago on SBS' 'Inkigayo' with "Fire", and they've stayed at the top of the game, climbing new heights over the last four years.

Now, they've come so far as leader CL is set to make her solo debut. To celebrate, YG Entertainment's official blog YG-Life posted a 4th anniversary photo for the girls. The poster even read, "ARE YOU READY?", probably alluding to CL's upcoming solo.

Blackjacks are also�trending #4everBeOur2NE1 and #FOUREVER2NE1 on Twitter. Congratulations on 4 great years for 2NE1!

2NE1's debut performance:


Tip: thehalftrue