Girl group MAMAMOO demonstrated their skills in a surprise guerilla concert near Hongik University.

On July 5, MAMAMOO captured eyes of passersby gathered at Hongdae's streets with their guerilla mini concert.

On this day, MAMAMOO performed various songs such as title song "Mr. Ambiguous". Although it had only been 3 weeks since debut, the crowds sang along to the rookie group's songs.

Despite the unannounced event, many fans gathered to the surprise concert via SNS.

The crowd danced along with MAMAMOO to "Mr. Ambiguous", and to thank fans for their enthusiasm, MAMAMOO wrapped up their mini concert by their cover of Stooshe's "Love Me".

After the concert, MAMAMOO expressed their gratitude toward fans through the WA Entertainment's website: "Today was an awesome opportunity for us to believe that many fans were out there supporting us. We're still new, and not many people know us, but we'll try our best so that many people can enjoy our music."

WA Entertainment stated: "We want to thank everyone for enjoying MAMAMOO's surprise concert. We plan to hold guerilla concerts in other locations as well, thanks to the support of fans."

Meanwhile, MAMAMOO is active in promoting their title song "Mr. Ambiguous".