Or is this just the greatest viral marketing campaign of all time?

Concerned bystander or attractive female star? You decide. (via YouTube)

People have been hearing and recording mysterious trumpet noises around the world. I've piqued your interest, haven't I? You'll probably want to pay attention until whatever is behind them is discovered—be it man, God, extraterrestrial, or ad agency.

It's true: people in the United States, Germany, Iceland, and elsewhere have reported hearing inexplicable eerie noises with no apparent origin. Or is it true? The only evidence we have is a series of YouTube videos, that are so casually (and therefore creepily) filmed they almost appear, well, faked:

Sources: Daily Mail | A Plus