In a lighthearted moment at a memorial service for former South African President Nelson Mandela, President Obama took a selfie with British Prime Minister David Cameron and Danish Prime Minister Helle Thorning-Schmidt.

It's a mystery whose phone was used since Obama in a speech last week said he doesn't have an iPhone. One thing is clear, however: the look of disapproval on First Lady Michelle Obama's face.

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 (Photo: ROBERTO SCHMIDT/AFP/Getty Images)