M.I.A. and Janelle Monáe performed a duet using holograms

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M.I.A. (who’s touring behind her recent album, Matangi, when she’s not pissing off the NFL) and Janelle Monáe (who’s turning 2014 into a victory lap following the success of Electric Lady) performed together last night—even though the former’s show was in New York and the latter was in L.A. Thanks to the magic of holograms, however, Monáe showed up to do a verse on the track “Bad Girls,” while M.I.A. performed an original contribution to “Q.U.E.E.N.” The results are pretty interesting to watch, involving such fancy tech trickery as integrated video mapping and 3-D projection, and—thanks to the quick thinking of a spectator—part of the “Bad Girls” performance is now online.