They should do both.
Step-by-step explanation:
We are a democratic country and everybody here be it a celebrity or a homeless persons has their rights to freedom of speech and expression, so everybody deserves to voice their opinions in the way they prefer unless and until it is harming somebody. Since, celebrities have the privilege of having one of the deepest impacts on the thinking of major part of the society, they should be allowed to be politically involved in order to represent their race and to demand a change and betterment of the society.