Girl group Girls' Day showed their thanks to their fans to celebrate their 4 year anniversary since debut.

July 9, Girls' Day revealed on twitter, "We want to thank our fans who have always been there for us these past 4 years. We hope that we can continue performing and give back the love we've received from our fans."

Girls' Day debuted in 2010 and has promoted with many hit songs since then. They will be holding an 4 year anniversary concert, 'Summer Time' on July 13.

They also thanked their fans for allowing them to go through with their dream to be a singer. 

On the other hand, Girls' Day's summer special mini album music video teaser will release on July 14.