The singer's ambitious transatlantic tour of seven countries in seven days continues
'Nobody's Business' is taken from forthcoming 'Unapologetic' album
South American date is the first of seven gigs in seven days in seven different countries
Up to 125 musicians are campaigning to stop online play royalties being slashed
Singer will showcase new album 'Unapologetic'
…but it's not for her acting skills
Singer unveiled the ballad from forthcoming new album 'Unapologetic' on SNL
'Unapologetic' single has earth, air, water and fire theme
Chris Brown duet is missing from the 17-minute taster
Eminem also features on the singer's seventh LP