"I thought they were being serious, but she sat down besides me."
"We had a good old chat. She is very gorgeous and has a groovy voice," Dr Sharples said.
Campbell had never been to New Zealand but had heard all about it. He said Bono loved New Zealand.
Another highlight whanau - was sandwiched between Bono and Naomi Campbell on bus to the tupapaku. Certainly an extraordinary occasion.
However, this light hearted moment did not take away from the seriousness of the occasion.
Dr Sharples said Mandela looked at ease.
"It was the opportunity to do a traditional thing to a great man."
He said he had performed a poro poro aki, which is a traditional Maori farewell for the dead and that he had done it on behalf of Maori people and New Zealand.
Labour leader David Cunliffe, who was with Dr Sharples at the time, said it had been a very sombre time and the dignitaries had filed past silently.
He said Mandela was dressed in one of his famous Mandela shirts.
"He was looking like a big man at rest," Mr Cunliffe said.