Following a sold-out concert in Paris on Wednesday, Madonna made a surprise appearance in the city's Place de la République to honor the victims of the Nov. 13 terrorist attacks that killed 130 people in the French capital.

The singer tweeted that she would be performing in the square and was joined by 10-year-old son David and guitarist Monte Pittman.

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The 57-year-old's set included John Lennon's "Imagine" and her own hit, "Like a Prayer." Pittman later told the AFP news agency that "She wanted to pay tribute, she loves this city.”

To the crowd gathered around her, Madonna shared, "Everybody knows why we’re here … we just want to sing a few songs about peace, just to spread love and joy, and to pay our honor and respect to the people who died almost four weeks ago."

Earlier in the evening, she told concert-goers, “I came here when I was 20 and it was here, in Paris, that I decided to make music. Thank you Paris for planting that seed in my heart!”

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The Grammy winner added, “We will not bend down to fear! I think of what happened almost four weeks ago now. The heart of Paris and the heart of France beats in the heart of each city."

Watch a video from the square below: