The song was a commercial success peaking at number 7 on the Gaon Digital Chart.
"Dream Girls" was described as trap pop dance track co-written by famous producer Famousbro and composer Paul with rap lyrics written by Lim Na Young and Choi Yoo Jung.
The music video narrates a different story for each member of I.O.I in which they pursue a different dream, showing their effort to achieve it.
The choreography for the song was created by Bae Yoon Jung, one of the mentors of Produce 101.
[3][4][5] In its second week, the song peaked at number 7 on the chart issue dated May 8–14, 2016 with 81,376 downloads sold and 2,453,059 streams.