Mark also Marek Ćwiertnia, known professionally as Mark Forster, is a German-Polish singer, songwriter and television personality.

Fee Jähn, known professionally as Felix Jaehn, is a German DJ and record producer. Jaehn achieved international success with his remix of OMI's song "Cheerleader", which topped the charts in multiple countries and reached number-one on the Billboard Hot 100 in 2015.