What girl group writes and composes their own music and also debuted a single and music video on the same day?
Pristin Pristin (Hangul: 프리스틴 ; stylized as PRISTIN and formerly known as Pledis Girlz) is a South Korean girl group formed by Pledis Entertainment in 2016. The group is composed of ten members: Nayoung, Roa, Yuha, Eunwoo, Rena, Kyulkyung, Yehana, Sungyeon, Xiyeon and Kyla. Most of them appeared on the television show "Produce 101" and, as the prize for becoming two of the top contestants, Nayoung and Kyulkyung went on to debut as part of the project girl group I.O.I, before reuniting with the other members to debut as Pristin on March 21, 2017, with the first mini album "Hi! Pristin". Like their labelmate group Seventeen, Pristin is known for writing and composing their own music.
Summer Girl (song) "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.