The track, a collaboration with Spanish DJ Dr Kucho! and The Netherlands' Gregor Salto, is the second Norwegian song to near the top of the UK rankings in less than a year, after Nico & Vinz scoring a Number 1 hit with "Am I Wrong" in October.
"My friends! I've just officially Reached Top 5 in the UK for the first time," Brun tweeted after the new rankings were announced on Sunday night.
The song sees the 39-year old singer jumping from her normal experimental folk genre into house music diva territory, allowing her to show off her powerful voice. The song, a remix, adds Brun's vocals to a club hit from 2005.
Nico & Vinz were the first Norwegian act to get to a UK number 1, since A-ha's 1986 hit The Sun Always Shines on TV. Take on Me! arguably A-ha's most famous song, only made it to number 2.