The "Bodak Yellow" rapper took to Instagram to freak out over the letter in front of her followers, and like most of Cardi's videos, it's joyous entertainment.
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View Story"He said I'm the biggest thing in Ireland," she said while clutching the note. "Bitch this is f-cking Bono. He knows me. He f-cking knows me, bitch. I can't believe it. I can't motherf-cking believe it. Nobody talk to me now."
Although the letter was hardly legible, the legendary performer's signature is clear on the paper.
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Cardi B later thanked Bruno Mars on Instagram for the opportunity to perform their hit "Finesse" on the Grammy stage.
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View Story"I want to thank you so much. I don't even know how," she wrote. "Maybe one day you'll need a kidney. I got you. Congrats on your wins tonight. You deserve it. You sing, dance, play instruments, produce your videos SHIT you probably know how to build a house, You ARE AMAZING and you gave me rhythm."