I know that periodically the statue of mannekin pis in Brussels is dressed in a variety of different outfits throughout the year. However, yesterday he seemed to be wearing an unauthorized additional item—a mustache. 
- Mannekin Pis with Mustache
When I took the photos, I didn’t even notice the mustache, but it was very obvious when I reviewed my shots. The is some writing on the mustache that suggests it is a prank done by a design studio. It is a little hard to figure how they pulled it off, though, given that there is a very obvious video camera pointed right at the statue. Over the years the statue has been stolen a number of times, according to Wikipedia, and the one that is on display is a replica. The original is in the Maison du Roi on the Grand-Place.
Close-up of Mannekin Pis with Mustache
© Michael Q. Powell. All rights reserved.
Mike Powell 
LOL! Thats toooooooo funny..:-)
I agree. Technically someone defaced a public monument, but it is funny and did no permanent damage.