Roots of Orange Caramel

After School (Korean: 애프터스쿨) was a South Korean girl group formed by Pledis Entertainment, with an admissions and graduation concept. After School officially debuted in January 2009 with the song "Ah!" from the single album New Schoolgirl. Following the addition of Uee in April of that year, they released "Diva", which won the "Rookie of the Month" award at the Cyworld Digital Music Awards.

M2M is a Norwegian pop duo comprising Marit Larsen and Marion Raven. Larsen and Raven had been friends since the age of five and formed a music duo when they were eight. They released a children's album in 1996 when Larsen was 12 and Raven was 11, under the name "Marit & Marion". The album was nominated for a Spellemannprisen award and the band changed their name to M2M after signing a record deal with Atlantic Records in 1998. M2M were frequently praised for writing most of their songs and performing their own instruments, something that was considered to set them apart from the majority of teen pop music artists.

10 cm is a South Korean musical act currently composed of singer-songwriter Kwon Jeong-yeol.