"Step" is a song by South Korean girl group Kara from their third Korean-language studio album of the same name. It was released as the lead single from the album on September 6, 2011, via DSP Media. The song was both written and produced by Han Jae-ho and Kim Seung-soo of Sweetune, who had worked on many of the group's previous records. In Japan, the song was made available to digital platforms on February 22, 2012, although no physical single was released for the song.

"Speed Up / Girl's Power" is the sixth Japanese single by South Korean girl group Kara. It was released on March 21, 2012, and was the group's first double A-side single.