The BBC also spoke to fan Noelia Verón - who saw him on 30 September and then again at the concert on 2 October.

She said "He was fine. Later people said he was either drunk or on drugs. But that wasn't the case at all. He talked to us, hugged us and even made jokes."

When Veron saw him at Niall's show, she said he was "dancing, waving and cheering" and "seemed to be enjoying himself".