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'Hup daar is Willem' reached number 4 in the Dutch Top 40 and was the last top 10 hit from the children's programme. One other single reached the Dutch Top 40, but that was an ill-advised song about the Dutch football club Ajax. Since I have no interest in sports whatsoever, I will pass on that one.
My collection: 7" single no. 4072
Found: Marktplaats.nl, received September 25, 2009
Cost: 1 euro
Tracks: 'Hup daar is Willem' / 'M'n bloementuin is m'n wondertuin'