The skull of a box-headed human.

Tragic solace found in human mortality, expressed through that which is dead inside. The human skeleton sings his suicide.

Spooky scary skeletons send shivers down your spine (lol no, its a skeleton crying while singing)

Skeleton is pouring water from a hole in its forehead while singing a jolly ditty.

A skeleton very cool with gas taking a shower

This is a wild shot, but I believe it's supposed to be Lionel Messi.

Bearded man's head.

shiny bald head