John Legend -- Hope It Gives You Hell, Boy

John Legend's major acting career begins and ends with "Soul Men" -- and if he was lookin' to expand his resume, dissing one of the biggest director's around probably wasn't the best way to do it.

Guillermo del Toro & John Legend: Click to watch
John totally blew off "Hellboy" and upcoming "Hobbit" helmer Guillermo del Toro yesterday at JFK.

It's hilarious -- as long as you're not Guillermo.