Karol Sommer D (born May 6, 1948) is a Danish singer-songwriter best known as the frontman of the heavy metal band Warplane. Sommer and guitarist Jesper Matthiessen are the only two members of the group to appear on every Warplane album, though he did not join the band until 1970, 3 years after it's founding.
Sommer's hobbies include football, ice hockey and Formula 1. He is an avid supporter of the football club Kolding IF. He currently lives in Kolding, and also owns vacation homes in Magaluf and Cancún.
Since 1999, Sommer has organized a series of annual football charity games between former Danish players, celebrities, musicians and the band members. The games take place at the Kolding Stadium. Spectators are asked to donate a pound of food and the gathered donations are given to charities.