What was written and performed by Viggo Sommer, Carsten Knudsen, and Uffe Rørbæk Madsen that resulted in invented phrases from the series to enter popular culture?
De Nattergale:  They have made several CDs and three TV advent calendars on TV2, of which the most famous is "The Julekalender". The Julekalender:  It was written and performed almost entirely by a trio of Danish comedy musicians called De Nattergale with financial and technical assistance from TV2, a Danish television company.
i don't know