'Laars Er Op' is taken from the 'From the Kitchen to the Garage' compilation which consists of 60's Dutch girl-groups.
I have no idea what Laars Er Op means, but in the Danish language Lars is a boy name, 'Er' is are, and 'Op' is up. So Lars Is Up? Up Where? I don't know, but I know this is your new favorite song. ;)
Deedee Pitt - Laars Er Op