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French singer Nadia Mladjao aka Imany performs on stage for the opening of the 23th edition of the Cognac Blues Passion festival in Jarnac near Cognac on July 5, 2016. / AFP / GUILLAUME SOUVANT (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)

French singer Nadia Mladjao aka Imany performs on stage for the opening of the 23th edition of the Cognac Blues Passion festival in Jarnac near Cognac on July 5, 2016. / AFP / GUILLAUME SOUVANT        (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)

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French singer Nadia Mladjao aka Imany performs on stage for the opening of the 23th edition of the Cognac Blues Passion festival in Jarnac near Cognac on July 5, 2016. / AFP / GUILLAUME SOUVANT (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)

French singer Nadia Mladjao aka Imany performs on stage for the opening of the 23th edition of the Cognac Blues Passion festival in Jarnac near Cognac on July 5, 2016. / AFP / GUILLAUME SOUVANT        (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)

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French singer Nadia Mladjao aka Imany performs on stage for the opening of the 23th edition of the Cognac Blues Passion festival in Jarnac near Cognac on July 5, 2016. / AFP / GUILLAUME SOUVANT (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)

French singer Nadia Mladjao aka Imany performs on stage for the opening of the 23th edition of the Cognac Blues Passion festival in Jarnac near Cognac on July 5, 2016. / AFP / GUILLAUME SOUVANT        (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)