In a Tuesday Instagram post, the Rich Kids Ruin Everything singer spoke out about his split with Girlfriend hitmaker Avril Lavigne. A representative for Avril confirmed to Page Six on 21 February she had ended her engagement with Mod Sun, whose real name is Derek Ryan Smith - the same day that a representative for Derek announced they were unaware of the development. The pair had dated for two years and were engaged for nearly one year before Avril called it off.