Question: 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?
Sentence (from "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.
Relevant evidence: Yes