SISTAR's Soyu and hip-hop duo Geeks collaboration song, "Officially Missing You, Too" ranked number 1 on the charts.

Starship Entertainment commented, "Their collaborative song ranked number 1 on music sites such as Bugs, Melon and others."

This was a success for both SISTAR and underground duo Geeks.

Many people were also shocked to hear Soyu's unique voice in the song. Many people felt that her voice alone was much different then when she sang as a group.

"Officially Missing You, Too" is a remake of their original song, "Officially Missing You." This new song had been remade with an acoustic session as part of a 'Re;code' project from LOEN Entertainment.

SISTAR is famous for their hit songs "Alone" and "LOVING YOU."