Niels Littooij (born 28 December 1989), better known by his stage name Nielson, is a Dutch singer-songwriter. He was a member of the Dutch music trio Zirkus Zirkus in the early 2010s, but rose to national fame in 2012 due to his participation in the television programme De beste singer-songwriter van Nederland.

Source: Wikipedia (https://en.wikipedia.org/wiki/Nielson_(singer))