just in the US there's been numerous ones...
rock the vote, get out the vote drives, voter registration efforts,
concerts, rallies, changes to mail - in voting in areas, same - day - registration movements,
advertising, phone calling, door - to - door canvasing, etc..
The dissolving of boundaries and transcending of conventions which frequently accompany
rock concerts, likewise shine through in the small - scale works, where Prince has adorned
advertising photos for pornographic films with stickers which normally serve as labeling for DVDs.