[2] In 2008, American singer Kesha provided the vocals for the demo of the song which has been leaked online.

[5] Seong Won-ho of IZM gave the song 1 stars out of 5, where he felt that the translated lyrical content and the group's vocal performance were a downgrade from the original version by Kesha.

[7][8] It was certified gold by the Recording Industry Association of Japan (RIAJ) in ringtone downloads in May 2011.

Throughout the video, there are scenes of the girls dancing in these rooms, and there are individual close-ups of their own unique Black SoShi looks.

[citation needed] The video is similar to the Korean version, except for altered dance moves and outfits.

At the first chorus, glimpses of the second setting, a dark room with the members in fitting outfits, are shown.

On March 11, 2010, photos of the members were started being released online showcasing a dark concept, the so-called Black SoShi.

[12] In the run of promotions for the song, an official iPhone application was released, available in free and paid versions.

[citation needed] Its first number one on network television was on KBS's Music Bank, where it won over Kara's "Lupin" and 2AM's "I Was Wrong".