Shirt idea?

I really want to know what the legal issues are with me selling a shirt online that says "Ke$ha owes me money" (or similar artists) as a campaign to support local, hard working, talented, indie bands that don't get recognition and don't get over-night fame by fucking Flo Rida, being a junkie and douche bag, and having no talent whatsoever that she has to rely on using auto-tune entirely throughout all of the songs that people she hires writes for her...