If you are awarded a grammy, you are considered to be the best artist among your peers. The problem is, the Grammys is a white-dominated organization and while it has long "included" non-white people, specifically Black people in the music business, the industry continues to support, promote and reward music that is harmful to black people in general and black women and girls specifically.
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If they have not been convicted of a crime, I don’t see how they could be denied. However, all citizens should be eligible to vote regardless of felony status or if they are serving a sentence unless we want to admit slavery was never abolished by the 13th amendment which created some kind of citizen-slave hybrid. The 14th Amendment and equal protection come into question for US citizens who face a different level of voting restrictions depending on the state felony disenfranchisement laws.