Maybe you should change your avatar to one of her.
Arrgghhh! Someone just said i should have asked them about the whole Schatje mag ik je foto/Chair lifting thing!
Dammit that's a great question!!
can't get on youtube to link to the clip - there is a horrendous cheesy Dutch song called "Schatje mag ik je foto" (Honey, can I take your photo) where at the chorus it appears to be traditional to get up off one's chair and wave it around one's head. It has become a standard on Dutch corners
No one outside of the Netherlands has any idea why they do this...