Niall Horan

Liam had been in the Argentinian capital to see his former bandmate Niall perform a solo concert, and opted to stay in the city for another couple of weeks.

Niall admitted that it was hard to realise that he had seen his bandmate for the final time.

He said: "I feel so fortunate that I got to see him recently. I sadly didn't know that after saying goodbye and hugging him that evening, I would be saying goodbye forever. It's heartbreaking."