Barry Gibb breaks silence on Olivia Newton-John's death with emotional tribute

While a few days have passed since Olivia Newton-John died at the age of 73, Sir Barry Gibb has finally broken his silence to pay an emotional tribute to his good friend.

Taking to social media, the Bee Gees singer, who performed many times with the Grease star, shared a photo of the pair singing together at a UNICEF gig in 1979.

Alongside the picture, he wrote: "I’m devastated by the loss of my dearest friend Olivia Newton-John.

"We lived through the same journey growing up in Australia and relishing every moment of it. We knew time was short and that time spent together was priceless."

He signed off his last message to his dear friend with the words: "Olivia, you will always be my sister and we will meet again. Love and light, Barry ❤️."

Newton-John died last Monday morning at her ranch in Southern California, where she was surrounded by family and friends.

While a specific cause of death has not yet been revealed, a source close to TMZ reported that "she lost her battle to metastatic breast cancer."

The 'Physical' hitmaker is survived by her husband, John Easterling, who shared the news of her death on her official Instagram account, and her daughter, Chloe.