Australian singer Tina Arena says her collaboration with disco legend Donna Summer, who died overnight, was one of the highlights of her career.
Arena met Summer in 1999 and so impressed the singer she was asked to perform with her in New York for a rendition of Summer's hit with Barbra Streisand, No More Tears (Enough is Enough).
The song was released on Summer's album Live & More Encore, which was also televised on US music channel VH-1.
Summer said during the concert she'd come across Arena through their shared label, Sony.
"In my family I found another little sister from Australia who is a wonderful singer and we met and we just hit it off," Summer told the crowd at the concert.
Arena issued a statement on Friday expressing her shock at the 63-year-old Summer's death in the US.
"I, along with many others, grew up listening to her music and admiring her vocal quality, along with great songwriting skills which were never properly recognised," Arena wrote.
"I will always be grateful to Donna for our collaboration on Enough is Enough (No More Tears) in New York some years ago.
"It remains an artistic highlight for me to this day."
Summer's family in Florida released a statement saying she died on Thursday morning and they "are at peace celebrating her extraordinary life and her continued legacy".
The family did not disclose the cause of death but reports said she had battled cancer.