there is no copyright issue if the drawing/image is her original work, but there may be a right of publicity issue with respect to the celebrity.
right of publicity laws vary from state to state (State Law)
Maryland is among the clear minority of States in which the right of publicity is not recognized as a property right either by statute or under the common law
So they will have little or no case law on the subject. It would be worth checking with a local attorney before starting the enterprise, but chances are it will not be an issue
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