The jazz legend recorded a song called 'Body And Soul' with Winehouse for his upcoming album Duets II.
Speaking on NBC's Today, he said: "What's going to happen is that we will put that [song] out ahead of the album. Her father started [a foundation] to teach young children not to take drugs. All the royalties from the record will go to that."
Bennett added: "That was the last record she made. It was great, she sang beautifully."
Winehouse was discovered dead in bed at her home in Camden, North London on Saturday, July 23. She was 27 years old.
The star's father Mitch later revealed that he hoped to launch a foundation in her name that would help individuals who are battling addiction and provide funds to causes that the singer supported.
Bennett had earlier told The Guardian that recording his collaboration with Winehouse had been one of his favourite experiences of making Duets II, comparing her to the "great jazz singers" of the world.
Duets II, which also features collaborations with Lady GaGa and John Mayer, is released on September 19 in the UK and September 20 in the US.
Bennett turned 85 years old today and was surprised during his interview on Today when a cake bearing an image of his new album art was presented to him. He will mark the birthday with a celebration at the Metropolitan Opera on September 18.
Watch Tony Bennett on Today below: