George Shelley has broken his silence following the tragic death of his sister Harriet.
The 22-year-old was killed following a car accident in Bristol on Saturday 6 May.
Paying tribute to his sister Harriet, the former Union J singer shared an emotional Instagram post, writing: 'I'll never accept you're gone'.
The 23-year-old shared a picture of the two of them together on Instagram, describing her as his 'best friend' and 'angel'.
"I will never accept that you're gone. You will always be with me. My best friend, my sister, my angel.
"Too pure and too beautiful to walk among humans, you now exist somewhere else, and I am honoured to have had the privilege to spend 21 years with you by my side," he said.
"Don't get used to it up there without me, I'll see you soon beautiful girl. I love you Harriet."
Harriet, 21, was left in intensive care after suffering serious head injuries in a car accident on April 28. She died at Southmead Hospital in Bristol a week later.
Following news of her death, George's former Union J bandmates took to Twitter to offer their condolences and support.
Jaymi Hensley, JJ Hamblett and Josh Cuthbert recalled George's "beautiful and wonderful" sister.
Jaymi posted: 'Devastated doesn't even come close! The most beautiful spirit and truly wonderful person! RIP beautiful girl! Love you George and family'.