It was one of the highlights of the social year, an arty party which coaxed some of Ireland's biggest names out to enjoy the paintings and champagne.
Calling in favours from over 300 well-known faces from the worlds of music, film and sport, the hosts mingled and mulled over the works on display, each helping to contribute to the ongoing work of the Chernobyl Children's charity.
While Hewson turned heads, she left daughter Eve, a talented up-and-coming actress in Hollywood, to keep a low profile in the corner. It was very much a family affair for the Hewsons – Eve's sister Jordan was also in attendance, as was their uncle, brother of Bono, Norman.
Spotted looking for their own works were artist Guggi, stylist Lisa Fitzpatrick, former politician Liz O'Donnell, MCD director Caroline Downey-Desmond, TV presenter Karen Koster and footballer Paul McGrath.
Morah and Lottie Ryan had barely arrived before settling into an animated conversation with RTÉ DJ Dave Fanning; while Brian Purcell said he was showing his son how to 'work the room'.
Better late than never was RTÉ broadcaster Ryan Tubridy, who popped in after "a quick beer" for some courage before seeing his painting on view.
"The fact that I actually tried to paint something is ridiculous. It reminded me of taking out a paint set when I was about 10. It was back to early learning for me."
And as MC Gráinne Seoige neared the end of proceedings, actor Patrick Bergin was another to arrive, after flying in last-minute from the UK. Showing no signs of settling into retirement, the 61-year-old revealed his plans to venture into his first operatic project.
"I'm narrating a Philip Glass opera, about the beginning of language. . . I never thought I would do something like this, but that's why it's exciting."