Chaka Khan, John Legend and Snoop Dogg have all paid tribute to R&B star Betty Wright, who has died aged 66.
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The Grammy-winning star, whose hits included Clean Up Woman and Tonight Is The Night, had been battling cancer.
A powerful, soulful vocalist, she was one of the first singers to use the "whistle register", later utilised by Mariah Carey and Ariana Grande.
As a writer and producer, she also created hits for artists including Bob Marley, Gloria Estefan and Joss Stone.
"We mourn the loss of this beautiful soul," wrote Khan on her Instagram page. "I will miss her so."
"I loved being around Ms Betty Wright," added Legend. "She was always so loving and giving to younger artists. Always engaged, always relevant. She will be missed."
Rapper Snoop Dogg thanked Wright for the "fellowship, mentoring and prayers and blessings" she shared with him.
"I know God is pleased with your work. Tonight is the night u get to heavens gates."
Gold disc at 18
Born Bessie Regina Norris in 1953, Wright began her singing career at the age of two as a member of her family's gospel group, Echoes of Joy.
She released her first solo album, 1967's My First Time Around, when she was just 14 years old. The record delivered her first hit, Girls Can't Do What the Guys Do, a scathing critique of sexual inequality, which was later sampled by Beyonce on the track Upgrade U.
It reached number 33 on the US charts, but Wright had to turn down an appearance on TV show American Bandstand when her principal refused to give her the day off school.
Her biggest hit came in 1971 with Clean Up Woman, notable for its funky guitar riff and boisterous vocals.
It reached number six on the pop charts and sold more than one million copies, earning Wright her first gold disc just days after she turned 18.
Further hits came with Tonight Is the Night and Where Is the Love, which earned her a Grammy for best R&B song in 1975.
Wright began mentoring other musicians when she was still a teenager, helping local singers George and Gwen McRae win recording contracts. Both of them went on to score top 10 hits.
Later, she acted as a vocal coach for Jennifer Lopez and co-produced Joss Stone's debut album The Soul Sessions.
"I believe in legacy and I believe in making the radio sound better," Wright told NPR in 2011. "If I gotta listen to it, I want it to sound good.
"So I'm tired of people disturbing the peace, getting on the radio and sounding a hot mess. If I can tell what the note really is, why let them go to the note they think it is? I've got that mama vibe. I don't look at it with an ego."
A career lull in the early 1980s prompted Wright to start her own label in 1985. She made history three years later when she became the first woman to have a gold record on her own label, with the album Mother Wit and the comeback hit No Pain (No Gain).
In the sampling era, many of her songs became the basis of other artist's hits - including Mary J Blige's Real Love, SWV's I'm So Into You and Afrika Bambaataa's Zulu War Chant.
But she was protective of her legacy - and took legal action against the boy-band Color Me Badd when they lifted portions of Tonight Is the Night without permission for their hit single I Wanna Sex You Up.
After winning a financial settlement, she recorded a song registering her displeasure at the practice of sampling.
"Baby, that ain't sampling, that's stealing / What's the matter, can't you write with no feeling?" she sang. "You oughta come clean with the real deal / If you had real talent, you wouldn't have to steal!"
In addition to her own work, Wright was also an in-demand session singer, recording background vocals for the likes of Stevie Wonder, David Byrne, Stephen Stills, and Erykah Badu.
She was also deeply entwined with the Hip-Hop scene, recording vocals on Rick Ross and Kanye West's Sanctified, and appearing alongside Kendrick Lamar on DJ Khaled's Holy Key.
Her last album was 2011's Betty Wright: The Movie, which she created with Hip-Hop legends The Roots.
Over the course of her career, she was nominated for six Grammys, including an album of the year nod in 2008, after she appeared on Lil Wayne's Tha Carter III.
"She was an incredible writer, producer and mentor to young artists," said Steve Greenberg, president of S-Curve Records, confirming her death from endometrial cancer.
Greenberg, who collaborated on several recordings with Wright, called her "one of the most significant women in the history of R&B music, period".
"You were so much more than your music," added R&B star Ledisi. "We were blessed to be around royalty. Thank you. I will never forget."
Ms Wright's third husband Noel "King Sporty" Williams, who co-wrote Bob Marley's Buffalo Soldier, died in 2015.
She is survived by four children and four siblings.