Keith's 6th Annual Masquerade ball took place at the weekend (1st December) at the Ritz-Carlton Hotel in Powerscourt, Co Wicklow.
With Grainne Seoige as MC, the fundraiser generated over €100,000 for charity Irish Autism Action and Saplings School in Rathfarnham.
Entertainment was provided by singer Jack L, and impersonator Mario Rosenstock, who was entertaining rather than mimicking an audience of VIPs, which included solicitor Gerald Kean, former Miss World Rosanna Davison, model Glenda Gilson, Today FM's Matt Cooper, and Newstalk presenter Norah Casey.
Speaking at Saturday's event, Duffy, who attended with his wife Lisa and son Jay, said: "I am absolutely delighted with the success of the ball. In these difficult times to raise this amount of money is incredible.
"The funds will help to provide children and parents affected by autism with the support they truly deserve.''