SISTAR have revealed teaser images for their upcoming summer song.

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SISTAR's official Twitter asked, "Who am I," along with the mysterious images below. Though the idol group is returning for the summer season, the teasers show a more serious and mysterious vibe. As previously mentioned, Duble Sidekick, who's the producer behind SISTAR's songs "Loving U", "Give it to Me", and "I Swear", has produced the track, so you know it'll be good!

You can expect the track to be out in the fourth week of June! Stay tuned!