[2] In order to promote the single, JYP Entertainment first released teaser pictures of each member in May 2008, showing the Wonder Girls in their new "sexy image".

[8] A new version of the song was included on the Japanese release Wonder Best (2012) and features the band's third line-up consisting of Hyerim, with Sunmi's vocals removed.

"So Hot" is a dance song that incorporate retro analog instruments and a "playful" rock n roll,[9] with lyrics about "a 21st-century princess soldier.

[12] A music video was produced for the song, showing the girls in various situations, with men instantly falling in love with them.

Due to vocal chord problems, Kim Yubin lipsynced her parts, as per her doctor's orders,[5] until the end of July 2008.

South Korean girl group Blackpink released a version of the song titled "So Hot (The Black Label Remix)" on December 25, 2017.

On December 20, 2017, it was announced that Blackpink would perform "So Hot" at 2017 SBS Gayo Daejeon held at Gocheok Dome in Seoul on the 25th, as a Christmas present for the group's fans.