Girl group SISTAR's new song "I SWEAR" teaser was released.

On August 21, SISTAR's agency Starship Entertainment released the teaser for "I SWEAR" on SISTAR's official YouTube channel.

In the teaser, the SISTAR members were dancing with Saipan in the background. Jo Yongpil, Tiger JK, and Jung Gi Go participated in producing the MV.

SISTAR's special album, "Sweet & Sour" is a dance song produced by Duble Sidekick. It displays all charms of the SISTAR members.

Starship Entertainment said people should expect a different side of SISTAR from their recent song, "TOUCH MY BODY."

SISTAR will release their new song on August 26.