It's been four years since Girl's Day's debut, and the ladies are ready to follow up their hit single "Something" with a brand music video for the fans.

On July 9, exactly four years after their debut, the four members of Girl's Day posted celebratory messages to thank the fans.

"I love you today, tomorrow, and even the next day with no change," tweeted Girl's Day member Hyeri on Twitter. "Let's be together forever. I love you!"

"Happy 4th anniversary to my favorite group," commented Carolynne on allkpop. "I will support and love this group forever and I will always be a proud fan! I look forward to their comeback!"

"Looking forward to their comeback," wrote strangeamygirl on July 9. "They are my second favorite girl group after Girl's Generation. I love how they can do sexy and cute concepts."

Girl's Day will next make their comeback with the single "Darling," with an accompanying music video to be released next week. According to allkpop, the K-pop girl group will also hold their very first solo concert called "Summer Party" on July 13, and July 14, Girl's Day will release their special anniversary album.

There is more anticipation than ever due to the success of Girl's Day's previous single, "Something." With this track, Girl's Day was the winner of several music shows in January, and the song also catapulted the accompanying EP to become their best-selling album to date.

Before the release of "Darling," here are some of the most entertaining fan reaction videos to their last music video, "Something."