Miley Cyrus, Madonna Performing Together for Miley’s MTV Unplugged Special

Madonna and Miley Cyrus attend the 2013 Billboard Music Awards
 Kevin Mazur/

Don't stop bracing yourselves: Madonna's epic collaborations continue. After joining Macklemore, Ryan Lewis and Mary Lambert (plus mass-wedding officiant Queen Latifah) onstage at Sunday's Grammys, the pop legend, 55, will be performing with fellow provocateur Miley Cyrus for the younger star's MTV Unplugged special, two sources confirm to Us Weekly. The stripped-down, acoustic concert tapes in L.A. on Tuesday, Jan. 28, and airs on MTV the following evening. (E! News was first to break the story, noting that Madonna and Cyrus, 21, were rehearsing together on Monday.)

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One source close to both divas tells Us that the planned duet came together "last minute" thanks to the efforts of MTV and their respective managers.

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No word yet on what the women will sing together, but Madonna and Cyrus' natural kinship isn't difficult to figure out: The elder pop queen was pushing the envelope — with brazen, frank depictions of female sexuality and more — in her music, videos, live performances and attention-grabbing interviews before Cyrus was even born.

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Shortly after her shocking MTV VMAs performance in August 2013, Cyrus quipped, "I don't pay attention to the negative because I've seen this play out so many times. How many times have we seen this play out in pop music? Madonna's done it. Britney's done it. Every VMA performance, that's what you're looking for; you're wanting to make history."

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