The musician, famous for his 2003 hit Be Faithful, was seen collapsing on stage during a performance in Connecticut
US rapper Fatman Scoop has died aged 53, his tour manager has said.
In a post on social media, Birch Michael - known as Pure Cold - said: "It is with the heaviest of hearts I announce the passing of Isaac Freeman III, known professionally as Fatman Scoop
Earlier, the musician, famous for his 2003 hit Be Faithful, was seen collapsing on stage during a performance in Connecticut.
Pure Cold added in his statement: "You taught me how to be the man I am today.
"I love you Scoop, thank you so much for everything you gave to me."
He also wrote on Instagram: "I am honestly lost for words... You took me all over the world and had me performing alongside you on some of the biggest and greatest stages on this planet, the things you taught me have truely made me the man I am today."
Scoop's talent agency MN2S also paid tribute to "our dear friend and client," and added: "Scoop was a beloved figure in the music world, whose work was loved by countless fans across the globe.