The song was supposed to be a duet between Kim and Lil' Cease from the beginning, but after filming the video for her debut single "No Time", Kim fell pregnant, she would later decide to abort. After this, Kim took a musical hiatus. This resulted in the album version of the song featuring just Lil' Cease. The single version, retitled as a remix, features Kim.
The "Crush on You" (Remix) was never featured on the "Crush on You" single, it was only featured on the "Not Tonight" single.