iamamiwhoami is the name given to a viral video campaign that has captured the music world by storm.It started in late December,with a video clip that featured spooky appendages sprouting from trees.Then,in January,a second clip loaded with images of a black mud-smeared woman licking a tree and some strange oozing sap.Later in the month, a third, this one was a slo-mo underwater dream sequence, with a whole lot of confection, a murky fetus and a sounds track that seems to be a singing whale shark.We think we know who it is.