"The things that he says are appalling to me and shocking. I was so shocked when he started to talk about the LGBT community -- when in fact, people working who did amazing work on his Celebrity Apprentice show were gay," she argued. "You don’t talk about your employees like that ever."
She added, "Even as a boss you have a responsibility for the people who work for you."
Lauper deemed Trump's commentary towards gay and transgender communities and other minority groups "racist" and "sexist."
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"No matter what his daughter says, it has nothing to do with what that guy is selling," she said. "That guy is selling inflammatory things that I have never in my whole entire life heard … except, you know, Hitler."
The singer noted that with Trump vying to be the next Republican president, the political party is not what it used to be.
"It’s pretty shocking. I don’t know what happened to the Republican party," she said. "And Lincoln was the first Republican — Abraham Lincoln. Let’s just put it in perspective."
Lauper appeared opposite Trump on season 9 of The Apprentice and has been a strong advocate for LGBT rights. In May, the singer fought against North Carolina's controversial "Bathroom Bill" by requesting for a non-gender-specific bathroom to be added in the venue of her Raleigh show and donated her concert proceeds to Equality North Carolina.
This story was originally published by The Hollywood Reporter