Madonna made a surprise appearance at the Women's March on Washington Saturday, speaking at the pre-march rally and telling those who are critical of the march "f--k you."

"Let’s march together through this darkness and with each step know that we are not afraid, that we are not alone, that we will not back down, that there is power in our unity and that no opposing force stands a chance in the face of true solidarity," Madonna said.

"And to our detractors that insist that this march will never add up to anything, f--k you. F--k you."

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"It is the beginning of much-needed change, change that will require sacrifice," she added.

The pop-star has been an outspoken critic of President TrumpDonald John TrumpRouhani says Iran will never seek nuclear weapons Trump downplays seriousness of injuries in Iran attack after US soldiers treated for concussions Trump says Bloomberg is 'wasting his money' on 2020 campaign MORE, saying on his inauguration day that the U.S. had gone "as low as it could go." Madonna endorsed Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonThe Hill's Morning Report - Trump trial begins with clashes, concessions Trump on Clinton's Sanders comments: 'She's the one that people don't like' Hillary Clinton tears open wound with her attack on Sanders MORE on the campaign trial.

“Yes, I’m angry. Yes I am outraged. Yes, I have thought an awful lot about blowing up the White House. But I know this won’t change anything. We cannot fall into despair.”

She then performed a set of songs, including “Express Yourself” and “Human Nature,” which she dedicated to “DT” — Donald Trump.