Answer
The single "Flatline" was released by the pop group MKS in 2014. The song was written by the group's members, Kimberly Wyatt, Mollie King, and Sarah Harding, and was produced by Steve Mac. "Flatline" is a dance-pop song with a Europop sound. The lyrics of the song are about a relationship that has gone wrong, and the singer is expressing their feelings of heartbreak and loss.