Sheridan Smith rocked the vintage look as she performed for royalty and President Donald Trump.
The actress and singing star wore her hair in 1940s-style victory rolls as she performed at the D-Day 75 National Commemorative Event on Southsea Common.
Veterans were invited along to watch the ceremony, and the audience was filled up with royalty and visiting world leaders.
Her Majesty Queen Elizabeth II was there with HRH The Prince of Wales, as well as American President Donald Trump and his wife Melania.
French President Emmanuel Macron, Greek President Prokopis Pavlopoulos, German chancellor Angela Merkel, Prime Minister Theresa May , and Canadian President Trudeau were also in the audience.
Sheridan looked stunning in a royal blue dress with lace detailing and long sleeves.
She paired her frock with ruby red high heels that were colour-matched to her slick of red lipstick.
Sheridan, 37, beamed a huge smile as she stood proudly on the stage and performed for the crowd.
It comes after the blonde beauty shared the truth behind the wedding ring she's been wearing recently.
She says she hasn't secretly married fiancé Jamie Horn, despite her new piece of jewellery.
She said on This Morning: "I do wear two bands on my hand, mainly because this one is too big and it does keep it on.
"But Jamie does wear his wedding ring, we're not actually married, we just do it. My friends do it but no one actually talks about it.
"We didn't think about it when we took a picture and put it on Twitter and then of course everyone thought that we were married."
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