The Welsh singer argued that colour was irrelevant when it comes to making music and suggested Estelle wasn't looking hard enough for black talent.
She told Radio 1: "If the talent and the desire is there, I don’t really think it matters what colour you are."
The 'Mercy' singer added: "We don’t live in the 1950s any more, we're in a multicultural country.
"So no, I think that’s pretty far from the truth. Look around and I think you'll see that it [Black Soul] really does exist."
Estelle said last week that she was surprised people kept using the term soul music to promote artists like Adele and Duffy.
She said: "I'm not mad at [Adele and Duffy], but I'm wondering - how the hell is there not a single black person in the press singing soul?
"They keep trying to tell me in the media what soul music is and I'm like, we know what soul music is, stop f***ing around with us! You're taking the p*** out of every black person in the country!"