f(x) made sure to thank their fans at their first ever solo concert, 'Dimension 4 — Docking Station,' held on January 29 to 31. On January 31, Luna said during the press interview prior to the concert, "We want to thank our fans for patiently waiting and loving f(x) for the past 7 years since our debut." 

Victoria then added, "I want to thank our fans for supporting us always, until we were able to hold our own concert after seven years of debut. The song that I wanted them to listen to was 'Rude Love.' I really wanted to sing this song ever since it came out if we were to hold a concert. It's a fun yet sentimental track. I really wanted my fans to hear it."

Krystal picked "Beautiful Stranger" as the song she wanted to perform in front of her fans stating, "I wanted to perform the song 'Beautiful Stranger.' Our fans like that song. I also want to perform the tracks that are included in our latest album, 'Four Walls.'"

Meanwhile, f(x) held a successful first ever solo concert where they even revealed the official fan club name as 'ME U'