Jennifer Holliday

That's sensible. I can't fathom why she agreed to do it in the first place - she's not a Trump supporter and I don't think it's much of a generalisation to say a lot of her fans are not Trump supporters either. And the only people who'll be at that concert in DC next week will be Trump supporters, everyone else will probably want to be as far from there as possible (the protest march is the day after).

Each to their own choices and opinions of course, but I just can't see what she stood to gain from it!