My car has picked up a lot of stuff along the way.

Rear window:
-University of Wisconsin-Whitewater sticker, with little gold DO 's on each side of it.
-10 semesters (including summers) of DLK-housing parking stickers stacked in a column from the bottom almost up to the top
-City of Milwaukee parking sticker in the upper drivers side corner.

Rear bumper:
AAA sticker

Drivers rear window:
Oldsmobile service sticker

Passengers rear window:
Smiley face cling