So is it art because he painted it?
In my mind, art is something you pour yourself into. Your art could be baking, gardening, decorating, writing, raising children, painting - whatever it is that turns you on. It's what gets you up in the morning and it burns bright in your body. It is the one thing you are willing to sacrifice everything else for.
So was Andy Warhol an artist? Yes...but I still think it's just a soup can. :)