Vegard Ylvisåker (left) and Bård Ylvisåker (right) - Official Ylvis Website
Guttorm Raa, the general manager of Ylvis's Norwegian record label, Warner, confirmed to VG that Bård and Vegard Ylvisåker would perform the song on Children in Need, the BBC annual charity fund-raiser.
"It is gratifying to see that our strategy in the UK is bearing results," he said. "This is the result of planned marketing and promotional activity. It will be interesting to monitor developments, particularly as Ylvis performs at the BBC's fundraising campaign "Children In Need" 15 November.
The song this week retained its number six position on the US's Billboard 100 chart.