[Kate!]

Louis Tomlinson

Payne's One Direction bandmate Louis Tomlinson has also posted an individual tribute on his Instagram page, saying that he has "lost a brother".

"I first met Liam when he was 16 and I was 18. I was instantly amazed by his voice but more importantly as time went on I got a chance to see the kind brother I'd longed all my life for," he writes on the social media site.

For the record, he says, "Liam was in my opinion the most vital part of One Direction. His experience from a young age, his perfect pitch, his stage presence, his gift for writing. The list goes on. Thank you for shaping us Liam."

He goes on to say that if Payne's son Bear - who he shared with Girls Aloud star Cheryl Tweedy - "ever needs me I will be the uncle he needs in his life".