On September 5, Luna and Amber posted nostalgic group photos via Instagram of their fellow f(x) members together in light of the group's eighth year anniversary since their debut.
Luna posted a photo with a caption that read, "8th Anniversary already...let's light up the night!"
While Amber posted three photos and a longer caption that read, "Found a lot of good memories going through old photos^^
When I didn't know how to say anything, they helped me, when I was scared and discouraged they told me not to stop and to never give up, when I was lonely they would pick up my random phone calls, and they even laughed at my stupid dad jokes haha… its been a crazy but amazing 9 years with them, laughing together, crying together, and even arguing with one another… and I hope to make more special memories with these crazy girls :) Thank you to my members, always! Love you guys!