This video was put together by Israeli performance artist Gal Volinez. Fair bit of warning, most of what he does is insanely NSFW.
But he recently decided to digitally insert himself into every single shot from Britney Spears' "Work Bitch."
Like, seriously, every shot. And he's doing all of Britney's moves, synced up perfectly.
Look at this dude slay it.
So yeah, there's fan dedication and then there's this.