According to Madonnarama, the Basque musicians "Kalakan" will join Madonna on tour as they will be part of the possible Tango Section of the show. Madonna met those 3 men last summer, during her holidays in France where she was host by her longtime pianists friends Labeque (they are two sisters we can see playing piano in the documentary "I'm Going To Tell You A Secret - 2006).
They will possibly be musician for the complete rearrangement of Madonna's hit "Open Your Heart", which will be mixed with their most famous song "Sagarra Jo" (youtube video above).
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