When Camille and her friends are at the swimming pool by night, they listen to a boom box playing the 2012 song "One Day/Reckoning Song" by Asaf Avidan and the Mojos.
In Camille's bed room in january 1985 you can see Madonna's True Blue album wich came out in 1986, a picture of Kim Wilde from 1988 and a poster of Madonna's first movie Desperately Seeking Susan wich came out much later in 1985.
During a party in january 1985 the song "Venus" by Bananarama is playing. The song came out in 1986.