The lead single from Under Stars, Amy MacDonald penned this song for one of her closest friends. Her comrade was going through an particularly tough time, which left her feeling helpless. The singer explained to The Sun:
"She then got a small glimmer of hope from a job interview and it was amazing to see how this one glimmer among a sea of negatives totally changed her whole perspective. Dream On was my little song for her. The chorus is the small glimmer of hope, the verses tinged with sadness."
MacDonald debuted this song, when she performed it live on BBC Scotland's Hogmanay 2017 show.