Update: no withholding tax from artists and sportsmen from treaty countries
The Netherlands has a 20% withholding tax on fees for nonresident artists and sportsmen. The promoter of a show or sports event needs to pay this 20% tax to the Dutch tax authorities.
But there is an exemption (already since 2007) for artists and sportsmen from countries with which the Netherlands has concluded a bilateral tax treaty. See the list in the downloads.