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Published 08:49 27 Jun 2013 BST
Updated 06:40 18 Dec 2014 GMT
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Rihanna's tweet for Nelson Mandela yesterday has been criticised for being premature and insensitive.
The popstar tweeted that she was sending prayers up to heaven for the South African anti-apartheid politician and peacemaker.
The 94-year-old former South African president has been ill with a lung infection over the past couple of weeks.
Nelson Mandela has remained in a critical condition and reports this morning say his condition has worsened.
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