"Summer Girl" is the debut single by Canadian pop band Stereos, written by Patrick Kordyback from their self-titled debut album. It was the song they performed on MuchMusic's disBAND reality show, which led them to being signed by Universal Canada. It was released as a single in 2009. The song is about meeting a girl and wanting to hook up with her despite the fact that she has a boyfriend.
In the music video, the band is first shown standing in front of a red car with the word Stereos displayed on the license plate as well as performing at a beach party. The lead singer is shown walking around a beach alongside two girls, and then attends the party later that night with her. Some of the judges on the episode of disBAND that the band was featured on can be seen talking to the lead singer at the party.