The color choice of the sleeveless, knee-length frock differed from Markle's latest all-black looks, while the sleek silhouette is nothing new.
"Since her days from dating Prince Harry we have defiantly seen a style evolution from Meghan", Lavinthal said.
And she's revisited another go-to brand for her jewel-encrusted heels. "In photos, sometimes it looks like she's glowing from within-from her soul-and I feel like that kind of makeup is lovely because you can't pinpoint it quite, but that's what it is".
But this time around she went all out with Veronica Lake-like waves that herald back to the golden age of Hollywood and the 1920s.
Soprano Lesley Garrett performed a WB Yeats poem, and Sir Karl Jenkins was to conduct The Armed Man: A Mass For Peace, an anti-war piece performed by choir and orchestra.
The concert was held to raise awareness for military veterans suffering mental health issues with all proceeds going to mental health charities, a passion close to the Prince's heart.
"Meghan is very doting with children", Nicholl continued. Her beauty brand KKW Beauty sells kits so that ordinary women can recreate the look.
"Her style was the one that really had the spotlight this year so we felt we had to not only put her on the list but make her the best dressed", Lavinthal added.