James passed away at the age of 73 in a California hospital today (January 20) following a lengthy battle with leukaemia.
© Rex Features / Matt Baron/BEI
Following a flood of tributes from other celebrities around the world, Beyoncé - who portrayed the 'At Last' performer in 2008 film Cadillac Records - posted her own message on her website praising the "fearless" musical idol.
"This is a huge loss. Etta James was one of the greatest vocalists of our time," she wrote. "I am so fortunate to have met such a queen. Her musical contributions will last a lifetime.
"Playing Etta James taught me so much about myself, and singing her music inspired me to be a stronger artist. When she effortlessly opened her mouth, you could hear her pain and triumph.
"Her deeply emotional way of delivering a song told her story with no filter. She was fearless, and had guts. She will be missed."
© Rex Features / Sony Pics/Everett
Beyoncé named James as one of her "musical heroes" back in 2009.
Recalling being coached by the 'Tell Mama' singer for Cadillac Records, she said at the time: "You can imagine how scary it is when you're singing someone's song dressed as them and they are watching.
"I knew she was very tough and I was really nervous. My heart was racing. At the end, I hugged her and wanted to cry."
> Etta James 1938-2012: Five of her most memorable songs
> Etta James 1938-2012: A career in pictures
Watch Beyoncé sing 'I'd Rather Go Blind' by Etta James for Cadillac Records below:
