"Mach" is a song by South Korean girl group Rainbow.

The song was released on October 20, 2010, and was later included on their second mini album So Girls.

All music is composed by Han Jae Ho and Kim Seung SooThe song was produced by Sweetune (Han Jae Ho and Kim Seung Soo) and written by Song Soo Yun, who also produced their previous single "A".

The song ranked at number 193 on Gaon's Yearly chart with 216,200,537 points and with 925,573 digital copies sold.

the lyricist of Japanese version : Natsumi Watanabe, Yu Shimoji and NICE73.