Three of the ex-boybanders also shared their own personal tributes and emotional throwbacks on social media.
In time, and when everyone is able to, there will be more to say.
The grieving artist also recalled cherished moments of their time together, even mentioning thatthey butted headsa few times.
And you know how loved you are.
Louis, 32, posted a picture of himself and Liam enjoying a moment onstage together.
I am beyond devastated to be writing this but yesterday I lost a brother, he began.
One Directions eldest called Liam the most vital part of the band.
The list goes on.
A message to you Liam if youre listening, he wrote.
I wish I got chance to say goodbye and tell you one more time how much I loved you.
I am truly devastated by Liams passing.
He was warn, supportive, and incredibly loving, wrote theWatermelon Sugarsinger.
I will miss him always, my lovely friend.
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